What you can try is in usercfg.opt is lowering secondary scaling at around 0.700000 or 0.800000
This in taa allow you in game to set taa above 100 or more.
This give me smooth sim experience in surround mode and windowed screens i use 7 screen setup to one computer driven by 2 3060 ti also have set textureresolution to medium and all others to high
Trees to low and grass off.
Take note that if texture resolution change a restart of the sim it is nessecery to take effect