BM
My impression is that the typical sim gives the impression that flying a WW2 fighter was difficult. Too often, the sim's AI is programmed such that "spins" are a typical result of over-controlling back pressure. This is simply not the case in most instances.
The average WW2 new pilot was put into a fighter-type aircraft very early in his career...much earlier than we do today. These guys somehow managed to survive...which leads me to believe that the planes were not killers waiting to bite the new guy on the butt that some sims make them out to be.
On the matter of flaps and WW2 fighters. No one should generalize about aero matters...there are too many "yeah but's" to make this foolhardy. Having said that, my belief is that most WW2 fighters had a conventional response to flap extension....the stall AOA was reduced, and the nose lowered as a result of flap extension. Yes, there were exemptions to this, but most often not.
Andy