Reference hotels 'not caring less', I have noticed that the chains care a lot about their Trip Adviser reviews and ratings. Espcecially if they receive several bad reviews at the same time, because this can have an immediate affect in bookings. The chains seem to have a person whose job is to monitor and manage those, as such things often do get done. When head office say, "Jump"... by contrast a complaint to busy staff in the hotel often does not get the attention it needs.
A few years ago I was at an OU weekend seminar in a fancy conference center. I noticed that they were removing all of the china mugs from the coffee bars and replacing them with plastic cups. I also noticed a hygiene issue in one of the toilets. During a break I went onto the company website, which popped up asking for feedback, and reported what I had seen. During the next break I noticed that all of the china cups were being put out again, and a manager sought me out to apologize and ask me to direct him to the toilet with a problem.
Perhaps the trick is to go on line while you are still at the hotel, if you want to benefit yourself.