Not banning one of my accounts. "Incidentally", the one that I used for moderation. That screams "we don't want you here unless you're working for us, for free" from a distance.
As a secondary reason: the ban message about "multiple, repeated violations of the content policy". It was one violation dammit. (I told a Nazi to kill himself.)
That was years ago. In the meantime I hopped from alternative to alternative. While still using Reddit mostly for trolling. Eventually the APIcalypse happened and there was enough content in Lemmy to make me forget about Reddit, instead of lurking once a week (like I typically did years ago).
I got banned for apparently promoting Nazi's. That was the first ban. Then I got my second ban for the same post for encouraging violence by citing someone who said Nazi's need to be put down.
Double punishment for the same piece of content? Inability to understand what users say? (Otherwise they wouldn't go back and forth between "u nazi" vs. "u haet against nazi") Failure to tell citation apart from endorsement? Lack of transparency? Lack of a clear policy on how acceptable it is to fight back against harmful members of society? That's Reddit.
Such amount of concentrated incompetence would be hilarious if not sad.