The reason Yandere dev got so much vitriol (besides generally being a gross human being) is that he loudly proclaimed that his code was great, and he was the best programmer, while doing things like making trivial O(n^2) loops in a game that ran terribly precisely due to those things. He also constantly sought free work from fans that he could profit off of, and even when people offered to help him make his code not atrocious, he pushed them away and was a toxic dick about everything.
He's the exact kind of "I'm the best" that every professional has run into before and cleaned up after.
This wasn't some amateur doing his best with limited resources to give a fun experience to the world, this was a hateful, angry person earning $3500 a month in patreon subscriptions begging for free 3D models from his fans, berating them for giving him free 3D models that "weren't good enough", and refusing to spend a single dime of that revenue on fixing, finishing, polishing, improving etc his abortion of a video game.
He's the exact kind of "I'm the best" that every professional has run into before and cleaned up after.
This wasn't some amateur doing his best with limited resources to give a fun experience to the world, this was a hateful, angry person earning $3500 a month in patreon subscriptions begging for free 3D models from his fans, berating them for giving him free 3D models that "weren't good enough", and refusing to spend a single dime of that revenue on fixing, finishing, polishing, improving etc his abortion of a video game.