As a kid, I never really knew much of anything about the people who produced what I consumed for entertainment, and didn't really care. TBH, the stuff he made after Ren and Stimpy is not as good, probably because there weren't as many people telling him what not to do, or a dearth of people powerful enough to make those recommendations stick.

Monsters can make nice things. You just can't sacrifice the people of the village to them. When the artist is incapable of working well with others, they are limited in the art they can produce. They can write books, and mail the manuscript to their editors. They can make animated shorts and publish on the web. They can't make feature films or television series. They can't be the "face" for the publicity campaign. There's too much human interaction, and not enough corporate lawyers to hold their leash and give it the occasional tug. And you can't put them in charge of the project.