Why is German pop culture less popular worldwide than American, British and Japanese?

[Peh]

Germany is famous for a lot of other stuff than just pop culture.
Inventions made by germany. People like Einstein, Nietzsche, Schopenhauer, and far more. We kicked the roman empires balls. Germany had always their prensence in time by being good or bad.
If it comes down to music and movies, there are certainly some gems there, but most of it is pure crap.