Ever since Linux support came out (2 years ago?), I go to check if they, finally, support “non-retina” “LoDPi” (a.k.a: a regular screen) yet, and sadly no :/
It's an ugly workaround, but if you install BetterDisplay (it's a free tool) and set your LoDPI screen to HiDPI, text rendering looks good.
Oh I'll have to try that. Zed looks woeful on my 1440p monitor when I was trying it at work, which is a shame because I quite like it otherwise.