Uncheck "No instant success" option in the difficulty.
I agree, but a lot of players would be bored. You can't expect any changes to DGEN because the designer has disappeared. As for hand made campaigns, well, you might be forced to build one yourself with those parameters.
May I ask what difficulty level you play on? I find that I don't rack up such scores because I'm trying to cover my wingmen as much as possible (I'm usually the last one in the flight). The last mission I flew in DGEN was escort in the Brewster. We had Moranes also with us. When we encountered Polikarpovs, the Moranes went in first and did most of the work. My flight leader did manage one kill. I personally saw no action that trip and had a warm cup of tea back at base.
No bombers or escorts were lost.