I'd say that just like there are people that just aren't suitable for certain jobs, there are mentalities that aren't suitable for living in certain places. In this particular case, she obviously tried to live a lifestyle that could work maybe in Berlin, but probably not anywhere else in Germany.

Her mentality regarding the language probably also works better in South Korea and Japan. These countries find it very hard to learn English, so they are more wishfull. Germans on the other hand needs to be a bit more insisting regarding language or they would create all sorts of issues.

No critique, but she made the right call to move somewhere else.