Last good Windows was Win2k and XP, nearly 20 years ago, became more and more bloated crapware with every release since then.
Linux IMO has a bit of a bloating problem as well, but since it's modular and open source, you can at least choose less bloated Desktop enviroments, ie LXDE, XFCE or Mate, instead of KDE4/Cinnamon/Gnome3 bloatware. And you can compile an optimized kernel were you remove everything that you don't need.
Windows as a kernel with minimal or open source desktop enviroment wouldn't be that bad, but the desktop enviroment, especially Win8, is such a piece of crap, that I ditched Windows a long time ago, for that reason. And since it isn't modular, you can either eat their garbage or ditch it entirely.