Fonts in GTK application in KDE Plasma 6.0.3 just look bad

[rockandstone]

Maybe related to this?

KDE 6 Upgrade Broke Fonts in Wayland

This is 479891 – Some text glyphs in QML software are mis-aligned or squished when using a fractional scale factor. It affects fractionally-scaled text. It’s looking like a Qt regression, which KDE contributors are working to fix upstream right now. Hopefully it’s resolved soon.