We all keep in mind that 80% of Wehrmacht was destroyed by USSR. USSR lost about 35 million people and 14.5 million soldiers, over a million second lieutenants.
Allies committed ~18 divisions to Italy, and tied down a smaller number of less capable German division, but also managed to get Allied units and commanders significant combat experience that was later used in France and Germany.
At the time of the Italy landings, it was announced that Germany called off their offensive in kursk to counter the invasion of Italy.
USSR lost about 35 million people and 14.5 million soldiers, over a million second lieutenants.
***Served them right. They started WWII when they teamed up with Hitler to divide up Poland.