They were treated extremely well (by POW standards) until the last few months of the war, when Germany was cut off from material and fuel due to allied bombing and the two fronts closing in. When they couldn't even take care of their own citizens, of course the POWs were going to get the worst of it.
Fun fact: The concentration camps the German built were objectively the most humane POW camps ever built.
What was life really like at the Auschwitz "extermination camp"?
Auschwitz "holocaust survivor" jew interviews, in their own words… watch this.
https://www.bitchute.com/video/KiwHozAsw1Il/
Orchestras
Painting
Sports
Hospitals
Nurseries
Ballet
Beer
Movie theaters
etc.
Was it a jew "extermination camp"? Or a POW camp where some people died due to war related starvation and disease?