Do you think this is a decent horse?

If your "trainer" can't handle your horse better than you can and you horse is acting "crazy" well then find a better one because she is obviously not training your horse is she? Where the flying **** does anyone get off riding a gaming horse (who should be direct reined) in a leverage bit like that? She is putting tens of pounds of pressure on your poor mares mouth with each pull, and why aren't her shanks hobbled? Always hobble your shanks so that they can't flip up like in your key hole photo. Your horse deserves better.