I'm not choosing to be difficult, you're "reasoning" is, well, unreasonable. You don't make any sense.
Color shift is acceptable because the phone was ahead of its time? Huh? That doesn't even begin to make sense!
First, NO PHONE is producing an insane amount of color shift. You are simply being absolutely unreasonable in your expectations, and hypocritical if you are giving the color shift that is evident in the panels of other phones a pass. And color shift IS EVIDENT in ANY OLED display panel if you look for it.
Second, no, it wasn't "ahead of its time", it was a great phone, that's why I bought it. But it didn't break any ground, OLED displays had been around since the Galaxy S2, at least. It was an evolutionary advance, far from a revolutionary advance. And there was nothing about it that would make a "defect" that you now consider "unacceptable" in the Pixel 2 XL for some reason "acceptable" then. The color shift is a NON ISSUE now, just as it was then, and I simply could not care less if you agree with that or not. Get over it.
Third, you simply decided that some "generation" number factory has to be perfect, which is utter nonsense. You don't get to decide anything of the sort. Those "generation" serial numbers are purely arbitrary, for one thing, and Samsung and LG will develop their own technology at the best pace they can muster. I'm certain that both companies are doing their absolute best. Samsung is farther along in their development.
I am certain that LG will get better, and equally certain that Samsung panels will continue to improve. But right now even Samsung's BEST displays exhibit some degree of color shift. I guess you're just plain out of luck.
You are or course within your rights to decide that the display is unacceptable to you. If you decide that the Pixel 2 XL has a display that you can't live with then just buy another phone.