Ubuntu resets my default audio every time I put it to sleep. I have no idea why, other distros didn't do this. Sometimes it fails to detect the speakers on my laptop completely.
I've found Ubuntu to need a lot less effort than other distros so I'm not planning to ditch it yet, but even Ubuntu still has weird quirks like this.
Also, some apps fail to open in x11 for some reason so I have to switch to a Wayland session every now and then. And then switch back to x11 because other apps won't open in Wayland.
Linux always has some weird usability issue no matter how many distros I've tried. It's getting a lot better but it's not there yet.