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.
I left due to the abusive, lying mods over at /r/steamdeck, I got permanantly banned (reported me for harassing over and over even though I wasn't) simply for criticizing them. Eleven years, gone. But.. I wasn't even upset. Reddit is a dead site full of karma bots and abusive mods. The admins didn't even check me out, they just killed my account.
Going to preface by saying I still use Reddit occasionally alongside Lemmy AND Tildes sometimes as well. I just like talking to people with similar interests.
Most of us came over to Lemmy (in my case, originally kbin) because of the 3rd party app shutdown and API apocalypse. I still use Reddit since it has a lot more communities I'm interested in so I wouldn't be an ex-redditor per say. I'm not nearly as active as I used to before 3rd party apps got shut down.
I was always indifferent towards Reddit as a platform since I mostly just felt connected to the communities there. I only use more niche subreddits related to my interests and was never active on any with over 400k besides from askreddit, so I avoided most of the stereotypical bad things about Reddit's community and the whole "Reddit is becoming like Facebook" stuff. If Lemmy gained these communities I love, I'd stop using Reddit completely.
The community and content matters to me a lot more with link aggregator type platforms, the software less so than it does with microblogging platforms like Twitter and such. Spez sucks for what he did but I really don't care enough to criticize the dude one year after the Reddit migration and the failure of the blackout. I like Reddit's sheer amount of content available and don't care for the software/anything paid on there, and I like the technology behind Lemmy but the community offerings less so.
They made things worse and invalidated everyone else's hard work before demanding to be paid for that while they live on the content we produce. Yeah get fucked. It don't work that way.
I felt like Reddit had been in decline for a long time. Then there was the API change and the debacle with the third party apps and I realised it was run by someone with no respect for the users, whose first instinct when something doesn't go according to plan is to lie and blame someone else. I didn't like that much, so here I am.
Reddit's site sucks so bad nowadays. You're bombarded with the "use the app" shit, it only loads like five comments when you first open the page, and you can't see NSFW stuff without logging in (despite it totally loading then pretending it didn't).