Why did Germany lose the war? Tell me what you think is the reason?

Germany expanded the battlefield too much in a short period of time, causing countries around the world to feel the crisis. Moreover, Germany's own manpower and material resources are limited (the North African battlefield was retreated because there was no supply), so they will deal with it together. Germany, and Germany should not attack the Soviet Union so early, should transfer those millions of troops to the Western Front and North Africa... This is a personal opinion