Damage happens, It is hoped it is spotted and corrected before a new customer is given the room. however sometimes it is missed, and the only way it come to their attention is by customer raising the problem.
I would expect linen to be changed between different customers using the room. and there being the right amount of towels for the number of customers in the room. although sometimes wrong occupancy level can end up on the cleaning teams sheet for rooms, causing wrong towel amounts.
Over the last year, I have worked on and off over on my works (a college) campus that has residential accommodations. We have 5 windows of opportunity to get in a do a full inspection of the accommodations. At any other time throughout the year fault, damage and problems are reported by the users (students) of the accommodation.
I am not defending the hotel, just pointing out my view of it from a service providers prospective.