My bad, im western centric.
German aircraft production in 1942 averaged 1296 per month, and by mid 1942 it had not yet shortened its pilot training schedule. 2400 aircraft lost in the Med was painful. The tipping point may have been just as much a function of the weight of aircraft being deployed by 3 major powers against it from 1943 onwards, if not more so.
I still dont get why they didnt take their pilot training more seriously. They had more than enough room in 1940 and 41 to step it up If they had focused it in Poland as we did in Canada, there would have been no way we could have got at their training installations. Its the same mistake the Japanese made, they had a large group of highly skilled aviators and thought they would last forever. They didnt.