At the end of the day basically every alt history scenario where the Germans are more successful in WWII boils down to "if only the Nazis weren't Nazis, then they could have won."

It's the exact opposite, things are over-centralized and far too top-down. Everyone from sergeants to NCOs to generals are given much less operational freedom and need to ask permission for things that they'd be expected to just do on their own in the US military.