If this guy wants to write about bad judgement and mistakes, he should consider reporting on the Canadian government's sending untrained soldiers to the front in Holland (Sheldt Estuary) in the fall of 1944. Thousands were killed, wounded and taken prisoner because they lacked the proper infantry training. Many had only been in the service for a month or less before being shipped off to fight the Germans. A good number of them didn't even know how to fire their weapons or how to use grenades.
Actually a bigger example is the entire Italian Campaign; basically a waste. Easily defensible terrain that tied down only a tiny force of Germans.
Theater definitely should have been shut down after Italy surrendered, and a case can be made that the Italian mainland shouldn't have been invaded in the first place.
I also strongly believe France should have been invaded in 1943 but that's a a pretty controversial one.....