Very much in agreement about the role of shame and basically your entire analysis of how that plays out.
Bo Burnham, of all people, made a good point (somewhere) about how, in converting all aspects of life into different apps you see on the same phone, flipping from one app to another as we like - we've created this flattening effect where everything is seen as part of the same basic thing, on the same level.
So social life, entertainment, politics, news, religion are all experienced in the same way. I think that contributes to the bizarre situation you describe where we respond to the amazon burning the same way we would respond to a member of our social circle being revealed as an abuser the same way we respond to a celebrity doing something scandalous.
Three thoughts on that :
1. totally debilitating and neutering politically. Like you said, the people in power just don't give a shit, they're playing a different game.
2. The irony and destruction and ( a certain kind of) joy that the alt-right exhibits is exactly right in one way. Its culture-jamming not unlike some of the Culp stuff (havent read through the article yet tho i should admit). The problem is the wrong people - or people infected by the wrong values - are the ones who are currently making the most use of it (tho Chapo etc. exist) which makes you wonder if the problem is
3. The Vampire's Castle. As in when you say 'we' and 'us' who is that? I feel like it has to be the group of people who feels this internet shaming thing in their bones and its really hard to know how representative that culture is of the nation as a whole. Whoever they/we are, its a group that believes in the power of shame, and, at a certain point, all that matters is that the shame hits its target, so we lob a desultory shame-rock at those outside our reach, and laser-shame those who are enough like us to feel the effects.
As to the convergence/interregnum man I'm not sure. I wouldn't describe your approach as cynical, because theory etiquette says there's no fullness, there's no it-ness, everything is in-between, forever. Or, if you like, it's cynical when facing the outside, believing when facing the in-group. It may be the case we're sleepwalking, or Zizek's cartoon character who hasn't looked down, but even if there's a hypnagogic delay between trauma and recognition, still 'bang, crash' at some point (Hegel)
(I'd say, cynically, that Gramsci was in jail a long time, which probably felt like an intterregnum, and the celebration of deferral by sequestered thinkers seems a lot like the way someone spirited away from the trenches would think about confrontation with reality - it never really happens, in fact can never happen (melancholy, safe) tho there are traces of *something*that remain with us, a haunting mystery.