Hi Carlos and Max
Many thanks for your quick replies. To illustrate my problem, I'll show you two pictures:
It's quite hard to get a safe pushback at LSZB these days...
...and you need very sturdy wheels to get onto the apron!
I use renderscale at 100% with a resolution of 1920x1200px and general quality at 100% as well.
I only use a 1080 graphics card with an i7700 CPU, but I don't think this can be the reason for it.
In any case, it is quite flyable most of the time.
Cheers
Alexander