Anime is popular with the youth these days, and that obviously leads studios to creating anime-esque shows to capitalize on the success. The simple solution is to not watch crap American animation, and watch the few good shows that are out there. Invader Zim was fantastic, as ed metioned, and I'm sure there's still SOME good American animated shows out there. As Kishi also pointed out, it's not like all Japanese animation is good, either.