Aliasing issue - Any suggestions?

[Shamespiral]

The anti-aliasing in my game is really terrible. Particularly trees in the distance. When I'm moving, the edges of objects (particularly distant trees) seem to flicker/shimmer in a way that's very distracting and immersion breaking. I have see similar aliasing problems in other games, but it seems for TLD very little I do helps.

I have tried forcing different forms of AA in the Nvidia Control Panel to no effect. I also tried setting the resolution in game higher than normal and trying to use DSR, also to no effect.

I got a result from setting my entire computer's desktop resolution to DSR x4.0, which seemed to actually apply the settings in game - however this was a bit too laggy to play in outdoor environments.

I'm frustrated by the lack of AA options in-game. I feel like if I could just foree FXAA or even supersampling, it would look a lot better. I'm losing my mind, because honestly I find the flickering edges so bad that I don't want to play the game until I could fix them. I'd even prefer if they were just jagged, rather than flickering so badly while the player is in motion.

Advice? Thanks all.