Again you're comparing stock vs doctrine specific. and an 'unrealistic scenario' thats happened to me twice just last night, and that ive done twice today as USF. In tank fights every shot counts, as that tank turns white, the shots are wasted on another tank. Throws focus fire out of the window.
Then again, 1200+ games as USF and your 7 games as Ostheer kinda say it all. Ironic you suggest I try USF when you dont play ost 
What the hell you are talking about you?
Its YOUR OWN SCENARIO he comments on, also why did you never built anything past T2 and had just a single
armored unit with some infantry against almost 80 pop cap of vehicles? Panzer tactician gives infinitely larger advantage then decrewing in combat(and loosing a tank anyway, because your opponent isn't a noob).
Have you ever wondered why literally no one decrews in combat for any other reason then quick crit repair under some smoke cover and even that happens extremely rarely?
Something tells me your problem is playing 4v4 and only that, because yes, that is unrealistic scenario in 1v1 and 2v2.