Hey Mike…
I too suffer your problem…The only two aircraft that behave in MSFS are the C172 and the B78x. Joystick works great in DCS and FSX (when installed 2019). I have checked and calibrated…forever. I removed the B787 and B747 from my community folder as per you suggestions and tried the C152. Control axis are all over the place…Yet soon as I load the C172 is all good. I smell something in the aircraft.cfg files across the board. This like many in our Sim World drives me nuts…