Yes he has won several open w/t/c classes (or at least our equivalent over here) but it is his first season under saddle, He may look like a million dollars and go like an angel but it took **** hard work to get him there. So if I use the walk/trot classes for both our confidence and for experiance for him is it realy wrong?
I'm sure several people at the shows we went to have thought we were pot hunters as the pony looks like he should be at far bigger shows winning the open classes, however he is a true novice.
All I am hearing from you is complaint after complaint that your horse didnt win and as you don't seem to be willing to put in the hard graft to sort your issues you want to get rid of the competition. Grow up and if you want to win then put the hard graft in. As your mare is getting 2nds and 3rds then she is nice enough it is you or her training letting you down both of which YOU can fix.
Your comments about people who can't physically canter not being at shows is also highly offensive to those who are disabled. I have a very close friend who has a girdlestone hip I.e she has absolutly no bones in one side of her pelvis and only half a femur (failed hip replacement). She is wheelchair bound but on a horse at walk and trot she is a far better rider than I could ever be, she was long listed for the London 2012 olympics however her disability means she cannot sit a canter as the action of the canter throws her out over the shoulder, by your reasoning she should not be in a walk trot class.