Mark Millar and Alan Moore seem to hate superheroes.
Alan Moore supposedly considered WATCHMEN an epitaph for superheroes. I know Moore doesn't write superheroes anymore, mostly since he doesn't want to work for Marvel or DC.
Someone once said "Mark Millar doesn't want to be Mark Millar." He certainly writes a lot of "You don't have to be crazy to be a superhero, but it helps" stories.