1. Lemmy is by and large populated with ex-Redditors, who bring with them some of the same hivemind on certain topics. Eg: Lemmy is very anti-AI or nuanced discussions thereon. Nuclear is bad, etc. Makes bad faith discussions on certain topics almost certain.
2. As everywhere else - there’s too much “you’re either on my team or you’re against me” - though notably less than in other spaces
3. Upvote / downvote counts: these should be yeeted into the garbage pile of history.

Things Lemmy does well

1. Less performative engagement.
2. Less American (but arguably that’s still too much for some).
3. Despite it all, a measure of civility still exists. Rare.
4. You can create your own instance and be ungovernable :)
5. No algorithmic engagement bullshit (so far)
6. I don’t feel like I have to walk on eggshells every time I post something.

I personally find Lemmy a great deal more pleasant to interact on, with strong pre 2010 forum vibes and I feel that’s a good thing. YMMV

TL;DR: There’s a lot less “look at me, look at me!” on Lemmy and it’s all the better for it.