I know nothing about FirstAidKite but he's overreacting a bit to his experiences with hbomb. I mean, there's something about the fact he thought "hbomb wanted to share fanworks I did years ago with our friends" was comparable to "hbomb revealed himself to be a sexual harassment apologist" that doesn't sit right with me.
Also:
hbomb kept [...] trying to share it with all of our mutual friends as a means of making me a "better person" because it was "for my own good" that he did this and that I should be thankful to him
I'm sorry but I doubt hbomb was whipping out this fucking villain-type dialogue about someone's old d&d RP. That's the sorta thing that gets passed around as vaguely-embarrassing cringe content and then gets forgotten about once the next vaguely-embarrassing tidbit about a friend comes out to laugh at.
Mind you I do believe that that entire social group (any social group with hbomb in it) has the capacity to be filled with assholes, it's just this particular anecdote that seems exaggerated