I don't think the problem is unique to German; Japanese shows dubbed into English have (or used to have) a reputation for bad translations, third-rate voice actors, and censorship. It's gotten better recently as the market has expanded, but most fans still prefer to see the shows with subtitles.
And a lot of people tend to think of anime as things for kids. I can name a few anime series that I probably wouldn't show a kid (Blood+ being a prominent example).