> A thing I noticed when I was away is how stupid and mundane Danish everyday local politics look

That's... surprising. I lived a few years in Denmark, and what characterized the country for me was the extreme anti-immigrant tone of the media and the politics. Now I live in the US, and what is happening with the current POTUS seems pretty moderate to me in comparison.

Actually that's my five cents on the "reverse culture shock": now I empathize much more with the situation of the immigrants back home.