i feel you man , my sparring partners are all reacting to every single staggers i do. Jax lack of real plus frames are the issue he cant setup shit besides in the corner with gotcha grab.Lol dude.
This entire KL season I'm just getting worked by the sheer amount of long distance disjointed/low profiling buttons that push you way far back out of all of your buttons' reach.
I've had Noobs "pressure" me by whiffing their mega high priority low recovery buttons in front of me, I've had Errons mash d3 max distance which is next to impossible to counterpoke with Jax buttons, f3 doesn't reach and f2 is too slow.
I've had my 1+3s flawless blocked, my fake command grab setups blown the fuck up because there are no real command grab setups, my staggers constantly poked out of, etc. etc.
Your MU chart is about right, this character loses - a lot, and funny enough it doesn't take much to really shit on this character. If you have really good downpokes as well as good damage you're already a better offensive character than Jax.