My lower res, lower DPI display from my old Dell laptop looks much more sharp and crisp than the fancy pants Framework 13 high res display.
I see scaling problems on Windows 11 (work PC) almost everywhere, in new dialogs and the older stuff. My own Linux box with Gnome has no issues; only webkit-gtk produces blurry fonts on some pages when my minimal font size conflicts with font-size of the page. This is a problem of the specific web page, I guess.
No HiDPI display here, btw. My old monitor is still good enough and fonts look awesome.
Disclaimer: I wear glasses and cannot see pixels where others might notice them. I increase font sizes everywhere, so font hinting has more to work with and everything looks sharp to me.
Only Windows manages to make it worse. ^^