The greatest issue, for me, is the lack of a end battle\withdraw button. Playing the French campaign, i had a battle go exceedingly well. All enemy infantry were dead, all but one enemy tank was disabled, and he was to scared to move forward. However, i had no chance in hell of killing him, as all attempts at recrewing the guns got them plastered with a HE round, and all my tanks were out of ammo. I spent over an hour, sneeking single infantrymen forward and collecting hand grenades from dead germans, in an attempt to kill or make the enemy tankers abandon their tanks.
In the end, i just rushed all my infantry at the tanks, to end the horror. That battle was mine, i had rightfully won it, but due to the fact that you HAVE to kill or route ALL enemy forces to end the battle, i ended up in a stalemate situation with no way out.