lemm.ee has one of if not the best admin, and was always running more smoothly in earlier versions. More than that, when other bugs were taking out .world and many others, lemm.ee was already immune and the admin helped the other instances sort theirs out too. lemm.ee has a lot of good users.
However, when hexbear was banned, users on that instance started moonlighting on other instances. There were very few instances that were still federated with hexbear but also with the others, where all the conversation was - many wanted one account that could browse both. Several went to lemmy.ml, the instance run by the formal lemmy developers, and there was a noticeable shift in user behaviour from the instance. But lemm.ee never really was targeted by the hexbear brigading that led to their defederation with everyone else, perhaps because lemm.ee doesn’t really have any massive communities itself, not as big as the others.
So yeah, lemm.ee can still browse hexbear, and with that you get a sizeable chunk of their userbase spilling over. So some lemm.ee users do indeed suck. It’s not as bad as .ml, though, and I think that’s in no small part thanks to the lemm.ee admin team keeping the more extremist users in check.
The two devs themselves are massive tankies. They also run lemmygrad.