>>148985391
Now, this is all from my admittedly distant and incomplete recollection, but...
...Bakugo hatedom is almost an archetypal example of being oversensitive about a bullying event. The most evil thing he does is in early flashback characterization that isn't really adhered to or called back to later on.
There's no sugarcoating the scene - it's violently discriminatory on Bakugo's part and he tells Midoriya to kill himself (it is also more realistic to what kids with superpowers would have tendencies towards than X-Men has EVER been) - but I don't recall him coming anywhere close to that level of animosity again. However, the scene existing near the beginning and being a flashback means it has a huge weight on how much of the fandom viewed the character for the rest of the series. We generally trust flashback characterization, but that one was uniquely extreme behavior, at least in the storyline up to when I dropped MHA.
From outside any MHA fandom communities, it looked to me like an author not realizing how many punches that scene should have pulled for the rival (but not antagonist) character they seemed to intend Bakugo to be.
They're kids, and Bakugo's acting like a bratty kid with power that's gone to his head and a target to use it on - it both could have gone way uglier and isn't something fair to hang over Bakugo's head forever (unless you're Midoriya, and he doesn't do that). He seems to have mellowed out somewhat (still very abrasive, though) by the time period the series is set in. Maybe they resolve the past trauma later, I don't know, but I think it was just something people felt more strongly about than the author expected... and IMO that's a fair mistake because it is honestly pretty accurate to a kid acting out.
It's almost too realistic an outburst for its own good.
A real problem fandom would probably be Endeavor defenders (few and far between, AFAIK).