This is a way longer answer than you deserve so Happy Christmas (or Hannah’s Car, or whatever).
Broad generalizations in either direction aren't informative and tend to do no more than reflect the opposing ideologies of the winners and losers. The winners will almost always say "The people got what they wanted" and the losers will very often say "The people were duped". Any decent analysis is going to look much deeper than either non-answer above to the question of what happened in a given election.
Re that, this latest UK poll is a nice one to analyze because of its dual-layer nature and the strategies that were taken advantage of to maximize political outcomes, particularly by the Conservatives (Labour might as well have been trying to minimize political outcomes though that was as much to do with the rock/hard place they were stuck in as incompetence). So, the dual layers were Brexit and everything else and they were interwoven in a complex way. The "everything else", which is normally all there is, can be sub-layered into party personality and party policy. First, the party personality or party "brand" is normally led by and embodied in the party leader and can be anything, but in this case the choices showed an unusual level of polarity (Boris’s brand was the (alpha) male—loud, forceful, closed, active. And Corbyn’s, as
@un pointed out, the female—quiet, restrained, open, passive). Second, the party policies are the functional aspect of the election outcomes and in judging whether or not the voters acted in a rational/self-interested manner are all that matters. So, if you can roughly determine self-interest by demographic according to a reasonably refined number of social and economic criteria and then look at voter behaviour, you can form a credible thesis as to the extent to which voters acted rationally, and the inverse, which is to what degree they were manipulated/deceived into acting irrationally (leaving out for simplicity’s sake cases where they were simply mistaken in a way that did not at all depend on political influence).
But even here, we’re over-simplifying things, and Brexit is useful in making clear how. So, voters can be manipulated into voting against their best interests by, first of all, obscuring/masking a policy, so they vote for a policy that's in not in their interest because they think they’re voting for something else or voters can be manipulated into
wanting a policy that’s not in their interest so they get what they want but it has a negative effect on them down the line in a way they may or may not become directly aware of.
From a strategic point of view, it’s better to make voters want a policy that’s not in their interest rather than to simply temporarily mask a policy that’s not, as in the latter case the deception is immediately revealed upon policy implementation whereas in the former the negative outcomes can be drip-fed and gradually spun so that voters may find it hard to discern what’s happening and the extent to which they are responsible for it vs. the extent to which it was a deliberate manipulation. Of course, that’s harder to achieve and takes a more sophisticated level of deception, but given the current deregulated, polarised, and diverse state of the media landscape and the technological tools available to inject ideology at an almost surgical level, it’s as doable as ever.
So, there’s a bunch of abstract, how do we tie it to the this election? Well, first a caveat, we’re dealing with a first-past-the-post system in the UK rather than a PR system and that determines to a large extent how the results are viewed, and yet both systems are accepted as being vanilla democratic. To give a quick example of this, the SNP killed it in Scotland; they got something like 80% of the seats, and the other three major parties had to share the crumbs of the remainder between them. The natural interpretation (and the most dominantly purveyed one in the media) is that Scotland has overwhelmingly spoken in favour of independence, it’s a juggernaut that can’t be stopped etc. Change the format of the election to equally democratic PR and the SNP get less than half of the seats. Suddenly, the narrative drastically changes. What remains the same though are the political inclinations of the population. Similarly for Boris’s victory. A stonking roasting of the opposition and a huge mandate turns into a hung parliament under PR. If you think PR is fairer, and it just
is in terms of pure percentages because as the name suggests, it’s more proportional, then that’s food for thought. But leaving that aside for now...
As mentioned above, the Brexit issue was interwoven with policy/personality. One very important point to make here is that the alpha male Conservative brand (personality) tied well into pro-Brexit feeling, which was often driven by a tough anti-immigrant, nationalist sentiment that bonded (and was one of the few things that could) class and geographic divisions. So, you had coherence there (and ancillary reach) which was added in emotional strength to by the fact that the Leavers who won the original plebiscite were faced with not a respected enemy but a bunch of namby pamby liberals trying to do them out of their victory (cue personal-historic associations in working-class leavers screwed by the neoliberal elite etc.). So, not only is the strength of emotion particularly intense in losing something you’ve fought for and fairly gained (from your perspective) in general, but in this case, among the personality type that was more likely to vote Brexit, the prospect was akin to an ideological castration by an enemy that was already threatening death by a thousand cuts. And this is what created the countervailing force necessary to smash through Labour’s red wall and ensure the Conservatives not just victory over but utter destruction of their traditional foe.
Getting back to the question at hand though, were voters manipulated/deceived etc? and breaking that down a little in light of the above. First of all, the brand/personality is always to an extent a deceit as its a deliberate strategized mask pulled over the policy platform, and it was reinforced by the vast majority of popular newspapers of the type read by Labour voters in its strongholds. But in concert with that, the dominant policy itself, Brexit, as mentioned above cohered perfectly with the brand anyway. So, to a very real extent the voters did get what they wanted and really wanted what they wanted notwithstanding the desire being much intensified by the Conservative/media alliance where it mattered.
On the other side, ill-feeling towards Corbyn was deliberately stoked and the conservative media cleverly managed to portray him both as a passive, weak, feminine figure and a dark socialist, anti-semitic, terrorist-loving threat. No mean feat. Again though, whether they had pulled this off to the extent they did or not, Corbyn was handicapped by conflicting wings of his party; roughly, the Northern wing, which leaned Brexit, and the Southern wing, which leaned remain. Seeing as the Northern wing was what the Conservatives needed for a majority, and potentially the angrier at an anti-referendum betrayal, it might have made more sense to have favoured that side, but the Remain camp fearing a Lib-Dem attack from the liberal flank made that impossible, and Corbyn was forced to sit incoherently on the fence without a strong message and without the strong brand to deliver it even if he had one. Recipe for disaster and as much a function of political reality as deception.
Last point, removing Brexit and brand and looking at regular and economic and social policies of the type that regularly take center stage in an election, did the defecting firewall voters (to take just one loosely-defined group) get what they voted for? Well, if you hypothesize that they simply prioritized Brexit and were willing to sacrifice themselves economically for that, yes. They went in eyes open. If you hypothesize that Johnson won their trust on Brexit and they believed his economic spin of his platform on that basis, probably not. So, it's complicated, and that’s just one group measured against an uncertain economic future under an unpredictable leader. But the more you dig, the more answers you get.
BTW, don’t dare tl;dr me or Santa won’t come down your chimney this year.
tl;dr: Yes. And no.