It's called "positioning", that's how you avoid getting hit by autos for free. Unless you're a tank, then go flash CC his ass because 550 units from the tank is most like mispositioned(unless the teamfight has already started).
Really, Jhin isn't even good! His plat+ winrate is like 40%, complete trash-tier. His damage might look OP because his autos hurt hard but a Tristana or a Vayne will auto you 4 times while he autos you once, doing much more damage overall and having an easier time staying safe while doing damage. Jhin can only auto 4 times before he has to reload for 2.5 seconds, effectively doing 0 damage.