>>103966066this is actually interesting dude fuck off.
Anyway OP I think your glossed over analysis has some merit but it does seem to vary depending on the era and on the character. The most obvious example is all those comics where Superman punched Nazis. There was a time and place for super heroes to just be concerned citizens that wanted to help where the State was unable (often due to villains that were likewise super powered) and they could have a good professional relationship. American super hero comics are now no longer self contained are aimed at teen and adult aged audiences which changes a lot about how a character is written and portrayed, at minimum having an adversarial relationship to law enforcement is an additional point of conflict for reader interest. You might be interested in Superman: Red Son, for a take on how a super hero might develop in a drastically different political climate.
So I don't think superheroes have to be libertarian but they often are. I'm not familiar enough with superheroes that embody anarchism well, there's probably a comic out there with a cast of supes that embody various political ideologies well in an interesting way that someone else can recommend.