Totally agree, but as the war went on training/tactics did a lot more than you think...
I'm not saying otherwise. I'm just saying that Germany sans Hitler who was a military dunce, also had some very good tacticians who were more than a match for anyone we brought to the table.
It was a simply a matter of we put so many guns, tanks, ships, planes, and bombs into the war theater that Germany simply couldn't compete.
Contrast that to today.
Our men have far superior training and tactics to the Taliban. And yet, 10 years later we haven't even subdued them in one country.
Because we haven't overwhelmed them with sheer numbers the way we did in WWII.