Once again I am going to step in and defend the majority of the boarding facilities and BM/BO's out there.
#1 - Interview. Ask any and all questions you can think of. If the answers are satisfactory - don't come back and complain later.
#2 - Tour. If you see things that need to be fixed, cleaned, etc and you still move in - no right to complain. Do not base your decision on plans the management has.
#3 - Horses are horses. We cannot tell them to not play or argue. Personalities can and do change in different situations.
#4 - IF things change - management, feeding practices, etc - COMMUNICATE with the individual(s) that can help.
Horse boarding is only a slight step down stress wise from human childcare. As BO/BM's we try and try and try but will be unable to please everyone all the time.
I'm going to assume everything was not always awful at each of the barns you guys are complaining about.