You are obviously neither an engineer or a pilot...
Door seal can be noisy, checked, unable to find anything wrong, few flights later may act up again. Many possible reasons. In this case it was obviously more going by the photo but no engo in his right mind would sign off an aircraft that he thought was not fit to operate within the scope of allowable limits. Personally through more than a few airlines I've seen and heard 'noisy doors' on all types yes inc 380. In all but one case it settled within a few minutes and was down to sand/pebble/water in the door. At all carriers was SOP to check prior to closing. Impossible to see sand/tiny pebbles. In one other case it was a slight dent in the metal door plate which was microscopic and easily given a temp fix by engineer until it could get to the hangar.
as for Baku, PIC obviously felt it was good enough, his arse was on the line too....