Unfortunately my X5 has disappointed me as well with regard to interior squeaks and rattles.
Fortunately I was able to eliminate the worst ones by wrapping the rear seatback latches with electrical tape. See this thread:
https://g05.bimmerpost.com/forums/sh...php?p=24137979
My old Audi S4 had no squeaks or rattles in 6 years of ownership, so I know it is possible. I traded the S4 for a GMC Yukon whose rattles were so bad I traded it for the X5 after only 7 months. You can imagine my disappointment that the X5 has rattles too, among other vibration issues that have not been resolved.
Good luck with eliminating your pops and rattles. Ps, if you're a 787 pilot, that's awesome!