I would suggest that you take a long, soft lead rope and place it around the fetlock area. Be careful where you place the clip so that it doesn't hurt the horse. For the life of me I can't remember if it goes in the front or back. It's been years since I had to do this.
But, once you get going you will figure out where that clip goes.
After you have it on stand at an angle far enough away from the horse so that you are out of the kicking zone but where you are still able to lift the foot up with just a little pressure from the rope.
If the horse goes to kicking, moving, backing etc stay with the horse best you can until the horse gives ANY sign of relaxing and release. Repeat, repeat, repeat. Do on all four feet. Also, do not tie your horse up, hopefully you will have an enclosed area someplace)
I had to do this on a horse I just bought years ago. He was only ok for me to pick out his feet but went nutso with the farrier. He would kick, bite, and try to get away like he was on fire! My farrier had to twitch him, sad to say.
And the next few times I did try Quietex, but that did no good.
I promised myself that he would never be twitched again so I set to work and tried the above.
It only took one lesson for him to figure it out and get better. He did need a few more lighter lessons, and had to get some history of trust in there, but was MUCH better after that first lesson.
He became much better for the farrier, not perfect, but manageable. I did have to ask the farrier to take his time with him, to greet him, to rub him a bit and to take a few seconds after each hoof to again reassure the horse that he was a friend.
After a few times of this the farrier no longer had any problems. In fact, my farrier said that he never thought that he would ever be able to do this horse without the help of a twitch or calming agent. (By the way, I think that the quietex did nothing)
I too wouldn't rule out any pain issue. It's possible that the horse has a bad back or something on those lines that should be looked into.