Why do you think Germany and its allies were defeated?

Despite the fact that Germany and its allies fought quite successfully at the beginning of the war, namely until 1943. From that moment on, they gradually began to lose the initiative in the war, which two years later led them to surrender. This can be explained by the fact that the Axis armies were exhausted by the war, especially since they were in the minority. In addition, the number of opponents of the Nazis was constantly growing. Thus, in 1945, the enemy was finished.