I have to do the same thing with my Kung Jin. My friends refuse to play him. It deflates them of the willingness to play.
It's strange, because I can play Kung Jin mirrors against other intelligent players using him who can do all his combos, and yet I'll still win. Even when I was using Takeda as my main I had no issues beating Kung Jin's.... I feel he's just so damn one dimensional lol.
If I know him down, I beat out the ex bow swing to burn his meter. If he has no meter I assault his ass hard. I play the neutral game to bait out his NJP, Dive kicks, or just mid range normals to be beat out with my better options at the time. I know how to block his one trick pony main combo, and I can react to the variations generally in time. You HAVE to eat some damage from him, and I'd much rather take an ex over head from back down circle from him, then let him ex bow swing me any day as that leads to 30%+.
You have to be ready to take small punishes on him to get the player to do panic button shit. If you block his back 2 1 4, and he doesn't extend it with a special---throw him. If he extends it with one of his other ex specials, block it, then throw him. He's super quick to being safe off ex's and at least throws will get you the knock down or a tech throw situation to reset the neutral game.
I guess I've never played a Kung Jin as solid as my own to ever worry about the character...I'd play Kung Jin's all day over the scary ass shit that Quan Chi's, Scorpion'S, and Kung Lao's can do.