> the core issue is that [Software] is in a constant state of flux. Regressions are introduced all the time because [Software] developers spend very little to no time checking that their code changes don't cause regressions or breakages outside of the problems they're trying to fix or features they're implementing

There, i fixed it for you. This is not specific to Linux. See Microsoft, Mozilla, Google.

Linux desktop is fine since the first release of XFree86 for it.

Quality of software has decreased.