Life in Prussia was different from life in Germany. They voted less to nazi party than the rest of the country in 1933.
Before 1933 life in Germany was better than life in USSR.
Life in Austria was good too. In 1914 polish people decided to fight for austrians under Józef Pi³sudski.
But Polish agreed only to fight russians and not the french/english. Therefore when the war stop against Russia in 1917 Polish people refuse to fight the french. Józef Pi³sudski was sent to a jail until the end of world war 1.
Furthermore polish people had some deputies in austian parliament before 1914.
They created the birth of polish governement of post was 1917 there.
However with Hitler's rule life for poles would have been a nightmare pretty soon.
For the nazis slavic nations were sub humans.
For example nazis left for dead 3 millions of russians POW in camps.