MacOS is a close second, with a few native apps that can't decide exactly what a checkbox or a button should look like.
And Win10 on my wife's machine is a salad, reminding me of Linux desktop experience from 1998.
This is pretty funny, because if you just use Gnome apps + desktop environment, you have a consistent experience. But if you only use Microsoft/Windows GUIs, panels and applications, it nowhere near as consistent.
So even the Gnome team can build better UI and UX than Windows themselves can, pretty telling.