My first thought is that he needs some groceries and a good exercise program.
His conformation doesnt look one bit thoroughbred to me. There are a lot of different conformation of QHs out there depending on what their purpose. By looking at him, he looks a lot like a racing QH.
Why are you so set on your horse being something other than QH?
My next horse will be a QH or at least have QH in him. They are the most outstanding breed out there. I wish every breed of horse out there had their workable mind. They are the most intelligent breed I have ever worked with.