Hmm... Odd. I flew the Normandy '41 campaign in it's full and smacked the **** out of the Luftwaffe. I do remember it seemed that both the AI and the squadron make up was a lot more balanced then what you're describing though.
Some of the campaigns are definitely one sided though. The BoB campaign on the Finland map... I played one mission and deleted it. I'm sorry, but there's no way I'm going to fly through an entire campaign getting my ass handed to me in nothing but Hurricane Mk I's. Even if you had vulernability off it'd be near impossible.
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