Let me guess… You’re running an X.Org based WM/DE?
X11 Doesn’t support fractional scaling properly . So some DEs will simulate it by scaling the apps the same way you scale a rasterized image like a PNG or JPEG, and as a result everything looks blurry. You’ll generally also have the same issue with XWayland apps on a Wayland display.
The best way to combat this? Try to use Wayland native apps as much as possible.
2nd best? Use non fractional values for scaling (x1 or x2 instead of x1.25)
Interesting, if it’s a native Wayland app, I’d guess the issue is just gnome problems then - from what I hear gnome is one of the poorest DEs for Wayland use, mainly because they refuse to support things the same way that everyone else agrees to, if at all. And they take a fair amount longer to deliberate and agree how to implement anything they do decide to support.
I’d think of looking at KDE, which is very functional at this point, or a wlroots based Compositor/WM, - hyprland seems like one of the more well supported window managers out of the ones using wlroots.