Well, I think it reflects quite well the truth how Allied forces learned to fight (remember how Germans saw it: incredibly poor at first, but damn quick to learn!) and during the battles I've began to suspect that they get experience even slower than player... Nevertheless, in '42 at last your veteran fighters, tactical bombers and tanks should be at level 15 (preferably boosted up) and enemy experienced troops are way easier than with rookies. As long as you have air superiority you shouldn't have too much difficulties.
Btw, my current campaign is in North Africa in '42 (6 major and 4 minor victories) and I'm having terrible problem: what the hell am I supposed to do with prestige over 6000??? I hate eastern front at spring and autumn, damn muddy weathers. Without them I'd have 8 major and 2 minor victories. Oh, and is anyone else frustrated with Italian and Romanian forces?
Most of the following casualties are Italian or Romanian:
