Same issue.
Worked for me for the first 2-3 days… after that no chance to get it running. i don´t come to the start screen anymore…it already crashes back to desktop at the “black secreen” with "white lines around it.
Reinstalling the App, Admin right, deleting all files, nothing helps. I tried everything i can do. World of Warcraft is running for 6 hours without any problem…
amd ryzen 9 5900x
32 gig 3600 ram
amd raedon 6700xt.
premium deluxe version of flight simulator.