I don't know...seems like a lot of people share your opinion on the XR. I've seen plenty of disparaging comments, here and on Reddit.
That said, imo you're a little off base. The XR isn't "much worse" than the X. It's a lesser phone in one obvious way - screen tech/resolution - but it's also objectively superior in a few not-insignificant ways. You already mentioned the SOC. The battery life is stellar. The screen might not be as good, but it displays more information (as much as the Max). And the camera is considerably better too. Even though there's no telephoto lens, the XR is capable of Smart HDR (thanks to the A12), which is pretty impressive - especially in low-light situations. Most photos on the X are taken with the wide-angle lens, and that's where the XR has the advantage.
And it's cheaper relative to the price of its X-series brethren (including the X when it was a current model).
For the record, I don't have a XR so I'm not "defending my choice". I simply think it gets dumped on inordinately. You are far from alone in your opinion, but imo it's a solid phone, which I consider underrated (as I explained earlier in this thread) - thanks in part to comments like yours.