There's something very wrong with the way mouse cursors are handled on Linux. If you have a low DPI display, the Adwaita cursor is ugly and pixelated. The same cursor image in the KDE theme preview is smooth and nice.

This is a common problem in GNOME, KDE, and wlroots. Probably because they all use the same library to load the cursor and... nobody noticed?

Oh, and of course I have to take photos of the screen, because screenshots do not include the actual cursor image that is displayed.