This is also the case with Pro M1 Max. Font is very blurry. It's funny how they turn off "scaling/sharpening filter" when video is watched. I've tried a bunch of things to fix it and none of them worked.
A 4K monitor I use works perfectly fine on Linux, but with Macbook Pro, even though resolution perfectly matches, it still has blurred font (the filter they apply completely changes the look of the font, even though I use the same one), everything just remains blurry and again, watching video disables it.
What are you comparing the font rendering to? Linux/Windows?
That's one of the things that pushed me to Mac from Linux: fonts finally looked nice. (This was around 2010.) I tried everything I could to get Linux to render decently but eventually gave up. I recognize that this is so much down to personal taste. If you prefer Windows-style ClearType to Mac's rendering, Mac (especially on a non-Retina screen) will look awful. If you like Mac's rendering, Windows tends to look awful at any resolution.
A 4K monitor I use works perfectly fine on Linux, but with Macbook Pro, even though resolution perfectly matches, it still has blurred font (the filter they apply completely changes the look of the font, even though I use the same one), everything just remains blurry and again, watching video disables it.