I tried Bluesky. I noticed two overwhelming trends that led to my hasty departure:
Wishful thinking left-wing politics. Encouraging people to pretend like how things ought to be is how things are, and to act accordingly. This is lazy and disastrous thinking, both because it overlooks the real systemic change that needs to happen to get to where you want to be. Though, in fairness, there is quite a bit of this on Lemmy too.
Extremely popular poster who spent their entire careers making the Trump presidency a certainly trying to back pedal on Trump specifically. No mention of their awful ideas they still keep and spread that lead to such an outcome. Lots of thumbs up and people saying "see, they get it" while also not connecting the dots, as if Project 2025 fell from the sky and wasn't the product of decades of effort.
It's an idiot convention.