No settings to adjust?
https://github.com/zed-industries/zed/issues/7992#issuecomme...
This is how Zed looks like on my computer too. VSCode manages to render things crisply while Zed is a blurry mess.
It's like they're rendering a high resolution font at low resolution using the simplest possible algorithm without lining it up with the pixel grid. It's very fuzzy. Characters have this weird sort of additive color intensity where strokes intersect that reminds me of Geometry Wars. It's broken.
They are working on it; the Windows build has decent rendering, and apparently the Linux version substantially improved recently. But they haven't gotten to macOS quite yet. I've been checking in on Zed every few weeks since it went public waiting for a fix.
(Though there must be some cutoff point past which the pixel size becomes irrelevant. I certainly don't mind reading stuff on the iPad.)