Megathreads were an improvement over the same story being posted a hundred times (not an exaggeration).
With regards to the question: the bigotry, the boy's clubs, the tactics to deliberately exclude some members from the conversation. I doubt Lemmy will avoid them wholesale, but maybe they will be curtailed and limited to a few instances.
Unsurprising. The proposed moderation system for the platform allows child sexual assault material (csam) just as long as it is labelled. - https://github.com/bluesky-social/proposals/tree/main/0002-labeling-and-moderation-controls