You should stick with the MA flying kick. If your team is built well you can do 500+ damage off of it and if you are fast enough it beats pretty much everything. You can also special step under them and escape, or you can MA - swaying willow to take back momentum, but the swaying willow will lose to some easy option selects so that’s only good against people that are unfamiliar. His jumping short will beat almost anything air-to-air also if you jump at the same time and you get one of those counterhit combos.
Jin’s anti air flying kick isn’t super fast so you have to anticipate a bit, he cant just hit a button on reaction every time. The trade off is that he can take off half of your life off of a good read anti air instead of just getting a low fierce. Just do MA when you are reading a jump, then press LK on reaction if they take it. If your reactions are slow, then don’t play Jin cause you’ll get jumped on all day long.
Basic anti air combo is MA - flying side kick, low fierce xx FP median line tag cancel, whatever. Does a lot. I have hugo second and following that with clap into backbreaker does 550 or so.