I guess what ticked me off was when OP said to Tinyliny, "I guess you tried", after she gave a very reasonable and well meaning response to his video.
I guess we all think at some point that we know more than we actually do, that tends to happen after we have had a few positive experiences, and that we are untouchable. I work with horses, and because of a one miscalculated move, I went through an event where I was double barreled to the ground and run over by couple of horses. I was taken to hospital because I lost my consciousness for a bit and got a hit in the back of my head and spine. After exams, radios and one night hospital stay, I walked (ok, limped) out with just a big hematoma in my calf and bruises - but what if that wouldn't have been the case? Horses are big fun, but they're also big animals to be taken seriously. That's something to consider, especially when you are a parent.
People who deal with reactive horses tend to get hurt the most. Reactive horses need a certain presence to help them to relax and calm down, and still things happen. People who think they cannot get hurt, will get hurt.
I get that you are attached to Patio and that you want to help him, but guess what, so do we who give advice! Granted, I don't always know how to express my self correctly, or hide my frustration in some cases, but I mean well. So do most of the people on this forum. You will just have to grow a thicker skin if you want to continue helping the association - because although rewarding, it can be a mighty tough path.
I'm going to give you one last advice that you didn't ask. In order for Patio to recover well from his injury and previous job, he is going to be needing regular physio and massage. I watched the video again, in fact all of them, and he is really stiff at the back and his front end is not great either. Someone experienced should do it, as horses tend to get cranky when the work is started, and you have to be aware of the possible reactions to follow. If he is really sensitive to touch, the ideal would be for him to get some time off in the field/paddock in order for the muscles to let go a bit before starting the manipulation.