> hey need to do 10x more than someone who is simply "a native" to the country (or... you'll stay in a position and just rot until you move on).

Staying in a position for a long part of one's life is a very common situation for many Germans, too. The whole concept of that you must have a career seems to be deeply ingrained in US mentality.

So, I have a strong feeling that a lot of immigrants who feel they hit a glass ceiling are rather used to the USA understanding how a career works, and think because they are not promoted, they are discriminated against, when in reality it's rather that a promotion to a completely new role/title is much more uncommon in Germany than in the USA.