That's not true, at least not in Poland.
Also, current German take-home salaries for coders are lower than Polish (gross amounts are similar, but in Poland a lot of coders are self-employed, with very lox taxes), with vastly higher costs of living. If anything, Germans programmers should emigrate to Poland - they're not getting a great deal in their country.
The main advantage of Western Europe is the lucrative contract market, where you can make much more money than in usual full time employment. A lot of these contracts are non-remote, so you have to live in a big city in Germany, UK, Sweden etc. to get them. However, some are remote friendly and still pay 500-600 eur per day. I personally work these contracts from Poland, pay my 13% flat tax rate, and am the wealthiest person I know in my age group thanks to it. The disadvantage of this strategy is that, if the economy is in recession (like right now), the contracts dry up first.
Not true in Romania at all. We're latin and way more US/angloshpere oriented than German.
Where did you get your information? You're probably thinking only of the parts of the former Austrian empire which used to speak German, but the youth there is also more Anglo focused than German, and it's only a samll part of eastern Europe