HORSES ONLY KNOW WHAT WE TEACH THEM
Horses don't have attitudes. They don't go off in a corner of the pasture and plan the day. The "attitude" they generally have (I will label it frustration) is because they are confused:
Our timing could be off
We are not consistent in the way we ask the horse to perform a task
We keep repeating things over and over, which leads the horse to believe it has to do something different in order to come up with the correct answer in order to get us to STOP.
Horses don't forget. About the third time I ask a horse to give me the answer to "what is 2 + 2" the horse starts to give different answers: why else would I ask it again and again and again, if the answer of 4 isn't correct? Hence the confusion and resentment.
That's where I believe video comes in handy. Have someone video you working your horse in a pattern or just doing simple task i.e. backing up. Watch the horse's reaction when you ask for the back-up and watch HOW you are asking. I bet you will see why he is going crooked, or turns to leave or doesn't move at all.
This and that
WE SHOULD TRY TO MAKE OUR HORSES' LIVES
AS NATURAL AS POSSIBLE
I am not sure where the idea came from of having horses eat UP off the ground. I don't mean that they should eat OFF nasty ground, for example a sandy, filthy place. I mean that we tie hay nets UP high, put feeder boxes UP high and even automatic waters are UP high. If you look at the pictures, the horses look uncomfortable.
In nature horses eat with their heads down, drink with their heads down and actually need to put their heads down, in order to let the moisture and dust that accumulates from exercise and environment, drain from their lungs. Horses that compete and are then tied to a trailer where they can't get their head down, can get pneumonia.