What's terrible about it? Fonts rendering? Or Wayland still not having "won" over XFree86/Xorg? I'm using Linux as my main computer since more than two decades and, if anything, desktop Linux is much better now than it used to be. Browsers and JetBrains' Java written IDE did a lot for that but even though I don't game I know people are playing games on Linux too. I mean: if you're a dev spending your life in browsers and IntelliJ IDEA (heck, or Emacs), Linux is sweet.
Desktop Linux is the distant third player after Windows and OS X but what's terrible about it besides its small market share (on the desktop, servers and appliances being another story)?