I think that a concise note to AA, worded in such a way that it makes it clear you ONLY want to let them know about conditions at a hotel on their list of IRROPS hotel, is in order.
Optional - if it were me, I would make it clear that I was NOT blaming AA and that I was NOT seeking compensation. YMMV. You could also send it without your name and AAdvantage number, to prove the point.
If enough people complain in this fashion, AA might reconsider using this hotel.