Even if the Germans did not surrender, the food eaten by 7 million people would probably be difficult to solve. I once saw a Soviet World War II movie called "Liberation", when the German army in the Soviet-German battlefield not only lacked clothing, but also lacked food. Especially at the end of the war, many Germans had to choose to surrender due to hunger, and the number of German troops who surrendered reached more than 800,000.
On 6 June 1944, the Allies landed in Normandy and the Germans faced a two-sided battle. As a result, the Germans were gradually defeated. The Soviet Red Army was even fiercer, liberating the Eastern European countries occupied by Germany. By April 16, 145, Soviet troops had arrived in Berlin, Germany. Hitler saw that the defeat was decided and had to raise his gun to commit suicide. His body was carried to the back garden and poured into gasoline and buried in a shell crater. The Fuehrer of Germany thus ended his life. Hitler was so crazy, since there were 7 million troops, why didn't he resist, because there was no capital to resist at that time.
Because Hitler knew that the German army was in short supply, including food and fuel, and of course weapons and ammunition. Even if the fight continues, the final result is futile, and in the end, it can only give up resistance. In fact, everyone can also guess that the food consumption of a 7 million army is an astronomical amount in a day. At that time, the Allies and the Soviet Union gradually liberated the land occupied by Germany, and the desire to feed the war was shattered. Coupled with the air bombardment of the Allies and the Soviet Union, the German mainland was already devastated. Local industries have been badly damaged, and the war machine has become unable to start. We know that Germany is an industrial country, and it has been bombed by Soviet and Allied aircraft, and the main source of food has been unable to supply, and the only way to resist is to starve to death. So the only way out for Germany was to lay down its arms and surrender, with little choice.
Although Hitler's army is known as the "torrent of steel", it is not eaten and is vulnerable. As the saying goes: "Soldiers and horses do not move grain and grass first!" "The most crucial point of operation is to have sufficient grain and grass, and once the logistics are cut off, it can be said that it is self-defeating." In a strong warrior, there will be no fighting spirit in the face of hunger. Therefore, the biggest difficulty of the 7 million German army is the lack of food, followed by the lack of weapons and ammunition, so combined with these two factors, Germany can not be satisfied, can only easily surrender.