Why wouldn't he be irritated? You're working him going the same direction for 25 minutes? Mindless circles do no good except to sour a horse. You should be changing directions at least every 2 or 3 circles. Change when you do it. 1/4 circle, full circle, 1/2 circle, 2 circles, 1/4 circle, etc. You will keep his attention better and get more respect.
It really doesn't matter what breed your horse is. That is not the cause of you problem. It doesn't matter how often you groom or work him. Not the problem either. He's fine with other people touching him but not you. That is telling you where the problem is. HE HAS YOUR NUMBER. He knows what buttons to push. He has learned what to do to make you nervous or scared. You get nervous or scared and you probably back off.
Any bad or unwanted behavior needs to be corrected immediately. No hesitation. He needs to feel real uncomfortable about displaying such behavior. A lead horse in the herd would not show him any leniency. Neither should you. That doesn't mean to beat him but you do need to correct him. Posted via Mobile Device