what evidence showed that most of all of the german populatioon was suffering under the Nazi regime

The Jews have been taken away, killed, or are in hiding...... Rosa has lost her last customer, the Mayor and his wife advise everyone to cut back because times are tough, the Hitler Youth are getting out of control, and Rudy is forced to steal food.

Rations, Air-raids, unemployment, forced allegiance - all of this contributed to the suffering of the German population.