The Incredibles is very overt about the whole objectivist "if everybody is special the nobody is"
The villain says that. When Thanos said half the population should be randomly killed, did you think that was the message of that movie? The Incredibles is about Bob navigating his relationship with his own biases. Syndrome is Bob's dark foil; a villain made of all the worst parts of Bob. Bob can only defeat Syndrome after learning to fight for something more than himself. He can only defeat Syndrome with help from other people who he loves. He has to stop believing that superheroism is about being better than everyone else.
the wannabe sidekick has no business trying to be one of the special people by inventing stuff
Because he's not trying to help people! Superheroism is meaningless without empathy. That's the thesis of the movie
the government and society are regulating these people who are intrinsically better into normalcy when they should be allowed to freely express themselves.
The government banning people who are different from freely expressing themself is bad... Wonder whether that's a left or right opinion.