Whatever else you think of Bluesky, it's a place where trolling and doomerism are rejected. The nuclear block (and a culture of block, don't engage) does wonders for denying actual trolls an audience, and secondarily for permitting people to do the virtual equivalent of walking away from someone who's behaving badly. In particular, doomerism about Trump is minimized there the same way.
There's a fine line between "rejecting doomerism" and "putting your fingers in your ears and going 'lalala'" though, and it's important not to cross it.
Sometimes I can't help but wonder if we're just shooting the messenger in placing the blame on social media.
Bluesky is full of people angry and screaming about Trump. In my feed, at least, though, the "it's all fascism, we're doomed" posters are getting blocked. It's an angry call to action that survives. They're consciously recognizing the pessimism is counterproductive and blocking.