Why should I pick Jhin?
Like how is he any better then Ezreal? Or Missfortune Or Vayne Or ANY ADC
He has way to many draw backs to even be considered UNLESS you legit build a 4 man comp around him , that can protect him, other wise he's utter trash. Even Yasuo who requires some comp built around him can do perfectly fine on his own. Jhin on the other hand requires to be baby sat to be of any use or he's just gonna get bursted down in an instant by anyone. He can't duel most adcs as he'd die before he even got to his 4th AA.
I honestly don't see a reason to pick Jhin over anyone, to many weakness's and to many draw backs to be of any use. Even if played to perfection. Idk I'd suggest making his reload speed A LOT faster , the reason is works on graves is because graves AA's hit REALLY fast in between AA's (And his reload speed is also faster) Graves can also kite with his E (He's also more tanky, and more burst)
Why should I pick Jhin?
) doesn't mean you're a better pick than more practical options.
work really well together.