Keep your anger out of horse training

Firstly working with the horse is not a contest.  If you aren't communicating with the horse and getting cross,  you may have come to the end of your knowledge.  If you get cross you won't teach the horse anything, and he won't be able to learn.  When angry (or fearful) you become ungrounded and out of control, the horse will feel this and respond accordingly.  Listen to what the horse is teaching you at this point and see if you can fill that gap.  Stop and take some time out to think.  Just quietly keep searching for the way forward.  Keep your ego and anger out of it.