Tried all of them, only lowering FXAA helped a little bit but not flyable in my view.
Specs: i7 8700K, 32GB DDR4 3200mhz, RTX 2070 Super
XP11: 11.41
Default airport ESDF at 1100z in Cessna 172 (Default) RealTime WX: Visibility 10km+ and broken 700ft
(Tried other airports with same result.)
XE Version - 2x FXAA - 4x FXAA
1.13 42-50 fps 38-43 fps
1.14 20 fps 10 fps (Whit all sliders on low and all boxes unticked.)
No other changes in XP11 was made other than the FXAA.
No XP sliders at Ultra and Reflection at Minimal as always.
I made sure any traces of Reshade which I haven't used for months was deleted.
Not any solution to offer I'm affraid but hopefully the report can help someone to find one.
Kind regards