Mod impunity, brigading, bots, reposts, repost bots, banning of 3rd-party apps, abuse of suicide prevention system by bad actors. Aside from the forum-specific culture, the site’s frequent failure to upload/post comments, which sometimes resulted in 100% loss of more detailed responses, was incredibly disappointing (I’m still Ctr-C’ing all comments everywhere as a force of habit to guarantee it won’t happen 5+ times/day).