Not trying to be rude, but judging from your posts, you seem like quite a high maintenance boarder. It's true that you will never find a 'perfect' place. There will always be something that you don't agree with. Did you sit down with the trainer and explain everything you've done with your horse? Are you 100% sure that your horse was abused or was his behaviour developed from people that let him get what he wants? More often then not, that is the case.
I agree that you should sit down with the trainer and his wife separetley and voice your concern.
And on the note with the horses not wearing blankets, it's been proven that blanketing a horse actually can damage the hairs natural growth and processes.
"You know, for as long as I can remember, I've had memories." ~Colin Mochrie