Is it harder for you to read English than to read German? I've noticed that I don't get irritated as easily by what I read when I'm doing something else at the same time, even when it's something that you wouldn't think would take a lot of brainpower--brushing a cat, for example, or eating. Multitasking, even if it's really trivial multitasking, short-circuits the indignation feedback loop and I just read something else instead of getting pissed off.

Either way, it doesn't sound like a problem so much as a life hack. Be proud: you've discovered yet another benefit to learning a foreign language :)