MK11 has the worst collection of spammers and what makes it annoying is that the game mechanics don't make it any easier.
If you run into a character like Jade or in this case Johnny Cage that simply spams projectiles and runs away, you'll be very frustrated.
In this fight, I managed my emotions, closed the distance but when using Jax, I kept dropping combos.
When I switched to, I was a bit more careful with my combos and did proper damage. For what it's worth, I could have done the same with Jax.
The main reason I switched to Sonia was because of Projectile. Jax's own projectile have a longer loading time, so Sonia was the best option.
In the first round with Sonia, you'll notice I tried to play the spamming game and lost. So I decided to mix it up by gaining a health advantage first and then spamming projectiles. It worked a peach.