& AFAIR, the LW operated 'Zircus Rosarius' a unit flying captured e/a,
who would demonstrate their attributes to LW units - with a view to learning best combat tactics..
Have you read H-W Lerche's memoir about LW test-flying e/a at Rechlin,
& finding out their performance attributes, like-wise?
Perhaps you are a bit to quick to dismiss J.J.'s description of VVS 'rabble' flying..
I have no doubt he accurately recorded his observations, & don't mistake poor flying discipline
for poor military discipline either, didn't the VVS have political commissars flying too?
Those basterds could have you off to Siberia, or shot summarily - if they saw fit...
& B, you cannot be serious trying to compare the Allied debacle in 1940 (or in the far east `41-42),
with what the Germans managed post D-day..
Even with massive over-kill, it took 11 months for them to do what took less than 11 weeks in `40..