About Professor Chaos origin
I find it strange that people don’t address the fact, Professor Chaos, Butters’ villain alter ego is a byproduct of Kenny’s absence (temporary prolong death) and the reason of Butters being kicked out of the group. Butters had a lot before that, but that moment was his breaking point. To be manipulated by them addressing “expectations” they had for a dead friend, using Kenny’s name, to guilt trip Butters to do what they say.
It lore wise it builds the dynamic of Professor Chaos being the arch-nemesis to Mysterion, Kenny, as the villain made indirectly by the hero.
As Mysterion, Kenny put on this hero alter-ego to make a bigger image of himself to crime-fighting in South Park and improve the lives of his siblings by confronting his parents as the cape crusader.
Professor Chaos, Butters, believed South Park is far from redeemable quality and his normal life behind the closed doors of his home is controlled by his parents. There wasn’t an escape outside nor inside so it made sense he had taken the villain route.