I typically would agree with your assertion regarding the GM interiors, but their recent refreshes may have solved some of those issues so it might be worth another look.
Regarding the QX 80, we had one and I found the interior quality to be decent however, I could never find the ideal driving position because the seat would not go back far enough for me. There was also a lot of engine noise, which may be solved by their 3.5 L instead of their V-8. Additionally, the thing felt like it was built like a tin can. The doors were light, unlike my F150, which sounds like a tank when you close the doors. All of those issues may have been addressed in the redesign though.
Toyota didn’t miss an opportunity capitalize with their half assed effort.
We are no longer in the market for full-size SUVs, due to my wife looking for smaller SUVs, but if we were, it would likely be a GMC Denali. I’m glad we’re not buying a full-size SUV, because all of my friends would be giving me such a rash of crap, lol. I always blame my wife though, when we buy a non- Ford product🤣