Feels like Linux is in a bit of a weird spot right now. It's "just worked" for me for a long time, but HighDPI really threw a spanner in the works. There are various ways to "support" it, but none of them work well, and they're sort of semi-incompatible with each other and introduce all sorts of weird jank.
Some distros try to fix it and mange... sorta. Yet if you enable fractional scaling on for example Pop! OS, that makes it so that full-screening a video changes the screen resolution to the video's resolution. ... for some reason nobody seems to be able to explain.
Then there's Wayland which breaks a fair share of applications on its own.
I've used Linux for a long time, must be over 15 years, and never seen it flounder like this.
Linux works just fine for me, on a lot of different devices. Use KDE and be happy forever with your setup. No issue no nothing, just works.