I think you misunderstand my point.
As you note above there are many different window managers, and several different X servers. Everyone I know has similar feelings to you, offer them a choice of Window managers and you get some variant on "I detest both". Offer a choice of distros, you'll hear "Life is much too short for Debian"., etc.
There's really no such thing as "Linux on the desktop", there are hundreds of combinations of Linuxes on desktops. Everyone has their own favorite, which they then customize even further (I do). Every so often someone decides "This is wayyyy too complex, let's make a single, simple one that everyone can use", and what happens? "I want a bit more from my desktop computers than ChromeOS". The result is XKCD. Rinse and repeat.
I've been using X-window desktops for 40-odd years, on VMS, SunOS, Solaris and multiple Linuxes. All different, all continuously changing, largely for the old reason "because you can". We may all grumble about Windows, but the reason it is, and IMHO will remain, the most widely-used desktop is because it's largely consistent. You can go to pretty much any recent Windows system & make it work, without having to figure out which window button means what, or how to bring up a menu, or where the file manager is etc.
As you say yourself, most people don't care about a desktop "which is the way it should be. They shouldn't have to.". They might get that on one platform from a specific Linux desktop, like ChromeOS, but certainly not from any generalised "Oh, it just runs Linux" setup, because there isn't one.