Regarding Linux here below - I think you ignored and brushed aside a lot of what I said. But that's ok. I'll just reply to your nicely numbered points.
As the novel that "Linux just works" is a pure lie.
Many products:
1. Get released only for Windows.
Hm. This doesn't automatically disqualify the statement that 'Linux just works'. How much of the stuff in Linux repos is open source stuff that was officially only released for Windows? I would imagine a hell of a lot.
2. There are never-ending dependency issues. Often even within the same distro.
Of course there are dependencies. And they're handled pretty well, no? You install a package, it has dependencies, depending on the dependencies you might need some other packages and so on. All neatly packaged. Hell, Windows has dependencies too, except you're left with an obscure error message when the software fails to run, to figure out what's missing.
3. There are so many distros, incompatible between them, is is a brutal pain to port SW across (again, as dependencies are a question mark).
Is Ubuntu incompatible with Kubuntu or Ubuntu Mate? No. Is Manjaro KDE or Mate or any other DE flavour incompatible between each other? No. So there aren't that many distros actually, as we don't count the desktop environment variants as incompatible between each other.
As for what remains, it is partly true - Arch/Manjaro users need some package builds in AUR usually, where as debian based/ubuntu users can use deb packages or ppa's and distro repos and so on.
I do think you're making this into a bigger issue than it actually is.
Stuff becomes available for Arch/Manjaro users very quickly, shortly after deb/ubuntu users I imagine. Rarely is anyone getting paid for that support, yet someone somewhere is maintaining up to date packages for people to build.
Hell, Arch and its flavours, are probably some of the last distros developers are releasing to - yet it's well known Arch/Manjaro can represent the cutting edge in Linux desktop gaming due to having latest versions of kernels/wine/dxvk+plus any other gaming software/drivers.
3. Should the above being false, the flatpak technology would not being developed and being looked a blessing
Fair point, snap and flatpak do make it easier, yet the incompatibility between distros you mention still seems exaggerated across Linux. However, you have more experience and knowledge probably in this area, so I can be easily convinced otherwise.
But from what I've seen, non-ubuntu distros wouldn't be so well supported/updated if what you say was true.
4. A lot of HW needs one or two Kernel releases to get finally supported. Often sub-part to Linux.
Maybe new bleeding edge exotic hardware, that doesn't work as is, that's true I suppose.
For most people, this doesn't even apply, gamers update GPUs and CPUs and accompanying standard PC hardware.
Name something that is on the market accessible to gamers that no linux distro can make run adequately currently? I'm curious.
5. A number of infinite quirks if you got strange setups with your desktop or exotic keyboards/mouses or other devices.
You would be surprised at the open source software that is out there.
You have a flashy blingey RGB mouse/keyboard/peripheral? You think there is no open source drivers/utilities to configure those on Linux? Think again. I think I already mentioned all Razer products work splendidly with openrazer, and if people bothered to look, they would probably find other brands too.
So no. Linux doesn't "just work".
I like Linux a lot.
I developed drivers on Linux as a professional.
As of today. As Linux is. Relative to gaming: give me Windows every day.
Tell you what. Let's play a fun game.
You point to a specific game you have that doesn't run on Linux at all / doesn't run so well on Linux, and if I or others can't prove to you that it's possible to run it as good as or almost as good as in Win10, I will accept that for gaming - everyone should boot Windows10 instead of Linux.
Also, to troubleshoot, name your distro, kernel, gpu, wine, dxvk versions, and what arguments you used to run the game and we'll go from there.
[Modded by Bookwyrm627: Please refrain from the social issues fighting.]