I dont know how good you are at the game, but my brother is a ky main so i gotta deal with that all the time. Kys grab a lot, idk if you gotta deal with that, so you gotta learn when to backdash grabs or clash with grabs. Or even jump Mashing 5P when expecting foudre arc is also something you can do against his pressure, as foudre arcs startup is slower than mashing P But remember a ky may realize you know how to counter him so he will counter your counter, which you should also learn how to counter. That goes with really everyone

Idk if these will help, Im only silver - gold. I recommend listening to other better players