I was all set to chime in and add that we have heard this on other ships (reflection) in rough weather, ALL ships flex and creak sometimes…
THEN, i watched the video in post #47.
You can see the seas are very calm, no whitecaps, almost no swells. The creaking and banging is LOUD, incessant, and intolerable.
How interesting that some cabins do and some don’t.
Cruisecritic is the perfect venue to list noisy cabins to avoid!
As far as demanding to be relocated, that isn’t possible if all cabins are full.