For me, it was the toxic circlejerk (admins/mods as well) low quality content getting upvoted while high quality submissions not getting much attention/buried and obvious privacy issues.
The official reddit app was borderline unusable (still is), and with Relay dead, there’s kind of not much choice for me. Turned out alright in the end, anyways - I like that the people here aren’t just trying to farm karma
Open-Sourse at the first moment. But Lemmy offer so much more then only being a Reddit in Open-Source.
What else does it offer for you?
The proliferation of Power mods, especially those without care for the communities they moderated.
A mod from a community that I watched go to hell was installed as a mod in another community I enjoyed, I brought up that he failed to adequately moderate a different community, and was given a ban from both communities.
The sudden announcement and lack of transparency in their API (aka let’s just do what Twitter did, because that’s worked out so well) was the nail in the coffin.
I’ve gone back to look once or twice, I can’t get to a number of my old subs because “they’re not proven non-NSFW, so we must not let you see them, unless you use our app” , I’ve checked there when big news has dropped, and it’s hilarious how bad their algorithm is screwing them, and how many bots there are in the comments when you do find the current news article.