lazycoconut
I liked him when he wasn't a god
Quite. Frankly I think Japan and America have exact opposite problems with their superheroes. The latter gets too dark and depressing and "adult material" laced, and the former is too toy-centric and childish. There's no middle ground.
You're comparing American titles aimed at teenagers/adults, with Super Sentai and Kamen Rider which are aimed at children - in Sentai's case, many of the target audience are too young to have started school. I could just as easily argue the issue is the other way around; look at this show and Kikaider REBOOT vs Power Rangers and Big Hero 6.
I would agree more generally that it's become more difficult to find something that can be a good superhero story for all ages. I would cite Ultraman X and Pacific Rim as examples but they seem to be an exception at present ...