What the hell, are we looking at the same pictures and video? To me at 4k and 1440p at the highest quality levels, FSR looks much better than DLSS. If you watch carefully you'll notice that DLSS makes the colors bland, I know the reviewer said FSR adds a bit dark, which I find it actually better looking than even native, but compared to native DLSS still has the issue of making the colors look bland. If you notice the blue color on the watch tower with DLSS it is bland, the blue color looks whiter and plainer, on native and FSR mode it looks richer and deeper in color.
Also with DLSS it makes the vegetation, especially tiny leaves on the trees look like scattered dots, it looks completely fake and unnatural.
At 1080p FSR starts to show its limitations and is maybe slightly worse than DLSS at highest quality mode.
So yeah, I'd say in this game because of the sharpening and darker colors FSR looks the best, even a smidgen better than native and DLSS looks the worst with bland colors, poor rendering of the leaves and vegetation in general and just an overall less detail in the textures!