Haven’t found a good use for Mastodon yet, but then again I don’t really miss Xhitter so it probably isn’t for me, anyway.
I usually just stick to Subs and Local on Lemmy, and since that means Beehaw, a tiny Danish instance and a board game community, I generally find that people are quite lovely.
The bad experiences don’t really come out of the woodwork unless I start browsing Everything.