Thanks for all those tips!
I´ve done all things you said, i checked my control panel in FS2020 and deleted all those buttons from the keyboard which are used to my joystick. Even tho i deleted my joystick and reinstall the driver but does´nt really helped me. The only thing that might looks good to me at least is the thing about the SFC scan. My computer did find some broken data and repaired it but still…
I also tried some tests ingame; Start, Fly, Landing. But i still can´t handle it. Even my sensitivity is cleared and run very well (for me at least). But when im in the cockpit and checking the control in front of me via camera, it´s still the same problem, that my plane is moving out of control whenever im moving my joystick too fast at the direction i wanna go.
One more problem is, that when im starting a fly on any runway my Jetliner does move backwards when i deactivate the parking-breaks. Such annoying sometimes…
No clue what i can do with my joystick in generel, expect buying a new one. Im just wondering why i didnt had to control the Joystick in past in FSX. It was running well from beginning to end without any sensitivity levels.