>>368293876
I remember it looking like shit when I first booted it up, believe it was due to the default trees and grass doing a number on the quest's compression. Once I had mods installed it looked fine. I think the below mods cleared up a lot of the visual noise which removed the compression artifacts. You could try them out, they should also improve your performance.

https://www.nexusmods.com/skyrimspecialedition/mods/21954
https://www.nexusmods.com/skyrimspecialedition/mods/31392
https://www.nexusmods.com/skyrimspecialedition/mods/24791