Kind of skimmed this, as I've found I don't have a ton of interest in the subject matter (sorry!) but I want to criticize this part:

Hitler's only real battle experience had been during WWI, a war where the concept of attrition was the only known method of combat.
That's simply false; the Germans famously defeated the Russians then in a war of maneuver, precisely what they should've done on the Eastern Front! It's also a bit of a simplification of the western front, on which the Allies certainly relied on attrition but the Germans tried to innovate tactics while pursuing somewhat more sophisticated strategic maneuvers. Even the idea of the breakthrough was more than mere attrition warfare, at least for some later war strategists.