I haven't seen a single article even trying to suggest that politics in Germany or Netherlands is affected by Facebook is any way. (And for USA, you can see such articles on HN front page any other day, btw).
The only gripe EU is having with Facebook is about privacy violations, as I can see.
HN frontpage and US news sources aren't a good indicator for what's happening in countries that dare to not speak English.
It's maybe not to the same degree, but political polarization, filter bubbles and conspiracy theories made worse through FB and other social media totally are a topic here. EDIT: I guess hate speech legislation is in a similar corner and does appear on here too.
The only gripe EU is having with Facebook is about privacy violations, as I can see.