That's just plain wrong. German PoWs in the USSR had a death rate of 15% to 30% depending on the sources, while Soviet PoWs in Germany had a death rate of 57% to 65% depending on the sources.
The Germans explicitely suspended its use in their armed forces for the Eastern Front – which is why millions of Soviet PoWs were left to die of starvation in what was basically large cattle pens while Jews or card-carrying Communists were to be shot on the spot after capture.