I think the average Darby fan has just learned of him about a year ago because of AEW, so I can give them a pass, the casual AEW fan. But a lot of AEW's audience are hardcore, dirtsheet reading smarks. Those fans likely know all about what he's done but choose to ignore it.
It really shouldn't shock anyone tbh, I mean the guy got his character's last name from GG Allin, one of the biggest pieces of **** in music history. So it's not surprising he'd have a darkside.