What's the most difficult thing to get used to as an expat that you've experienced in Germany?

I moved to Germany long time ago, and still have some difficulties and stuff to get along with after years of being here. Don't get me wrong, I love the culture and the people. There's so much Germany gives me that would be unthinkable in my home country.

But besides the usual problems about the social dynamics (and I've gotten to meet incredible people that break the views I had before), it's be for me the endless bureaucracy that's constantly pressuring, especially as a student because of the financial part.

Not trying to rant, but l'm actually genuinely curious about what other people have experienced that I hadn't even thought of, or haven't gotten there yet.