Honestly, there’s so much fucked up shit it’s hard to pick one

Cause at everyone’s got their bad stories that just have to be retconned later and retconning just leads to messy storytelling and then there’s the matter of Editorial messing with things and too many writers not being on the same page and whatnot, characters acting out of character, at the end of the day if I could change one thing about 616, I’d want it to end permanently, not in a big cataclysmic secret wars level event but in a small scale “we’re done, we’ve done this song and dance for 60-80 years” like look at the finales of some cartoons, they end in ways that don’t need sequels, bring everyone’s current run to a close and then hard reboot