So then you will know what to do. I consider my own MSFS performance as proof positive that perfect simming is possible.
And OK I’ll rephrase that to gigabit exchanges then. My point still stands about server location, as an expert you should do a trace.
Edit: Something to think about is although I’m on often at all times of day or night I don’t really do uber-long flights and I usually close the sim inbetween. I’m not sure if that means anything though.