Jhin is pretty much unplayable unless you are either Bronze or High ELO
In low bronze no one has any clue what's going on, you can win with anything there and play whatever you like.
In high level play you have a dependable team that will not lose the earlygame brutally and can and will peel for you.
And in between? Either your team screws up so hard early that when you reach your item-gated powerspike (IE+Another offensive item) the the nexus turrets have fallen already OR no one has any idea how to play in a team or how to peel properly ( which sadly takes more skill than the enemy assassin needs to just walk up and murder me).
I think Jhin needs a little poweshift, down from his monsterous brutal lategame to his completly garbage early-mid.