Oh great, another person who knows nothing of anime but still atempts to judge it. Miyazaki is considered a master in his field, many disney animators credit him as their inspiration.
Most of Miyazaki's works were done completely by hand. Let that soak in. Hundreds of thousands of cels.
Anime is not a children thing. You seem to be under the impression that the only anime is pokemon and dragonball Z. How very wrong you are...
I believe Miyazaki also did Grave of the Fireflies. It's a war movie. In fact, Roger Ebert even said "it belongs on any list of the greatest war films ever made." He also reviewed My Neighbor Totoro, and said it one one of the best family films ever made. But, if you'd like to say anime is for kids - do a little research. For instance, the few animes I am watching/following right now: Honey & Clover, Monster, and Serial Experiments Lain. Honey & Clover isn't licensed in the USA yet, but I'd imagine it'd be rated 16... Monster would be at least 16, and SEL is licensed and is 16+. Oh, and I saw a movie called Akira a while back, it is rated R. There is always something to be appriciated in anime, and it takes skill to make. Each artist has his own style. For instance, I could tell if Yotoshi ABe was the artist, because he has a very distinct style (ala Serial Experiments Lain, and my favorite, Haibane Renmei). Then there comes the soundtrack. Haibane Renmei, for instance, has amazingly beautiful music composed for this series by a very talented composer, Kou Otani.
Well, my whole point is that anime is not just for kids. In fact, the majority is not. Seeing as all you have seen is one kids movie that, I believe, was hand-drawn, please don't judge every single anime.
Edit: Oh, and for God's sakes...Dubs are *AWEFUL*. I only watch subbed, because the english dubs are often not very accurate in their translations, because Disney does the horrible "dub-to-fit". They're notorious for having crappy dubs, and actually, the disney subs usually kinda suck too. But they're still better than dubs.