See, all of these things would be great reasons to use Windows, and I agree that these are nice (though I'd hardly call "seamless GPU switching" unique to Windows; my Linux laptops can do that perfectly fine with FOSS drivers).
The problem is that the Microsoft-sanctioned Windows desktop experience seems to be actively hostile to user experience due to all the extra shit that Microsoft has tacked onto the "goodness" that's Windows 10:
- Cortana not only enabled by default and difficult to remove, but shouting at me at max volume as my very first experience with a new Windows installation
- Random apps being preinstalled, even on so-called "professional" versions (hell, even on enterprise versions by default - and yeah, it's trivial to disable these things with GPOs, but I shouldn't have to)
- Literally no option to create a user account in the "home" edition that doesn't entail connecting to an online account, which is dumb as hell
- Ads. On a product that I paid money for. What the fuck, Microsoft?
Each of these things in isolation is itself entirely unacceptable for any product that even remotely respects its users. In combination, these things make Windows 10 Home and Professional the two absolute worst versions of Windows money has ever been able to buy, and fundamentally undermine any trust I might have in Microsoft.
I would, however, change my tune in a heartbeat if LTSC was at least an option, if not the default, for desktops. Windows 10 LTSC is what Windows 10 should be, and probably would be if the Windows team didn't seem driven to make the default Windows UX as janky as possible. I still think Windows 2000 was peak Windows, but LTSC is almost there - all the neat things you mention, and none of the bullshit.
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EDIT: there are also a bunch of little papercuts that bug me every time I use Windows, like never knowing which tool is the "right" one to use for various things (screenshots come to mind; what was wrong with the Snipping Tool?), or the fact that "ClearType" is anything but. Not that Windows 2000 didn't have its own share of little papercuts, but when an OS has accumulated 20 more years of those papercuts, they start to really add up.
Also, maybe I'm just butthurt that Microsoft dropped Space Cadet Pinball ;)