Something must be wrong with your setup, surely? I've had great enjoyment with the GA aircraft with over a hundred hours of flight. My only difficulty has been with the over-sensitive rudder. I too am a long-time flight sim enthusiast, having started in 1982. I think it's a bit harsh to describe MSFS2020 as you do. There is a great deal to admire about it, although it certainly has quite a few annoying bugs at the moment.