Actually, I think I disagree with this premise. It's pretty often that there are progressive forces in fiction that are pretty cool. Whether it's the X-Men or the Rebels from Star Wars. Plus, there are many villains that are basically leftists like Poison Ivy or Killmonger, and to some degree, Magneto.

Like if super villains were real, you can bet Hexbear would give some of them critical support because they are, for all intents and purposes, fighting the good fight