I got to page 21 and the talk became repetitious. This says it all (from the OP)
I need professionals to ride through his huge powerful bucking and get him over the trauma of having people being injured by it. He doesn't trust anyone on his back anymore because they all keep falling off. (That includes me!)
If a horse bucks you off, he/she has just been taught, "If I buck, the rider goes sailing." Some horses learn this the first time they do it. It is NOT traumatic to the horse.. horses will buck for fun (even out in the pasture with no one on them.. just playing) and horses will buck because of discomfort and horses will buck as an evasion.
I see CA took down his post though I liked it. One of the issues with this world is everyone would like to be presented with a polite statement of fact.
Quite honestly, I think a little anger and a little telling where the bear crapped in the buckwheat is appropriate sometimes. It was appropriate in this case.