You're one of today's lucky 10000 to learn about German customer service. They are arrogant, rude, useless, and expensive. There is no plot twist or hidden joke, it is what it is.
If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.
Most customer support interactions I’ve had with German companies have been terse, but so far it’s never been inefficient. My last support interaction with Hetzner was something like (paraphrasing):
> Can you please open port 25 for outgoing traffic on my servers? Thank you
> Thank you for your request. It’s already open. It might be misconfigured. Please check your firewall rules. [link to docs]
So yeah, no “have a nice day”, no “please let us know if there’s anything more we can do”, but honestly I don’t want any of that stuff. It makes the interaction feel less honest and real, and I don’t expect everyone I interact with to (act like they) love their job, I just expect them to do their job. Maybe that’s the German mentality?