What should religion do for us today? As a believing and practicing Catholic, I’ll address the OP’s question: What does religion do for us today?
For myself, my Faith provides for me a way of life, a purposeful teleological, rational and benevolent universe designed and managed by a rational and benevolent God of pure Good.
To me, without this, the universe is a purely chance driven existential cosmos in which nothing means anything.
In my mind, it’s far more unlikely that this universe of ours developed purely by random chance after the Big Bang ( A theory developed by Father Georges Lemaitre, a Belgian Catholic priest ) that somehow developed a stable set of physics laws that allowed for us to evolve than to believe in a God Who set off the Big Bang and guided the developing universe along His benevolent design.
As for one poster’s assertion that the Church is a sick joke: I respectfully disagree.
The Church did much good in all her 2,020 years. Sure, we’ve had our bad popes and churchmen; but, we’ve had 2,020 years of many wonderful saints who did great and marvelous things for their fellow human beings.
In fact: I’d contend that the Church built Western civilization after the Western Empire’s fall.