I think you need a place where you can take care of your own horse yourself. From all the drama over details that is the only way I see you being happy. Sorry, but that is how I see it. You expect a LOT. Period. If I was the BO/BM-I would be praying you would leave. JMHO. Or-move him back to the trainers. Seems like you were happy there. I get the impression that if problem A is fixed, we will move on to another issue and the list (as illustrated above) is endless.......
No matter how many times you give it lip service, I don't think you think your horse can just "be a horse".
I also believe that possibly-just possibly-the BM/BO MAY know something you don't and have something to offer. I doubt very much that you, or the other boarders know everything. That attitude alone would certainly turn ME off from trying to help you.