Okay, this time I'm showing what my gameplay looks like after 30 minutes when warthunder is running, because my computer starts to heat up in this summer.
Just showing that the pilot AI is actually very dependant on the fps and if it's too low he over-rolls/steers/whatever too much.
When my computer isn't overheated, my normal framerate is around 5-8 with that many trees.
Especially bombers. Each "swing" on bombers takes a long time, and hence when the bomber swings, oh gwd i can't even aim a 250 kg bomb at 1000m altitude! (And i lose ~200 m height per swing too)!