Can someone explain Jhin's passive to me?

Ok, so you get basically a round of 4 shots. 4 shot is a truck that should be focused onto an enemy champion, not a creep. Think like Caitlyns passive headshot.

Edit: You prob meant the second half.

You get AD from building crit and attack speed like Vlad gets AP for building HP. When you crit, you get movespeed. How much movespeed is based on your attackspeed.

He can't crit every auto, only on his fourth one. He doesn't get any benefit from attack speed either. If you buy an item with crit or attack speed, you'll get more AD instead.

OK i see alot of things but lemme go in alot more detail

You have 4 shots in your chamber. On your fourth shot you automatically crit and gain movespeed for a few seconds (2-4)

You dont benefit from atk spd or crt chance but instead gain AD

You have a reload time of 1 second (lol hi there skinny Graves)

movespeed is based off atk spd and so is reload time... atk spd is generally good anyway...

come to think of it, if u build Runnans, i think you can multi crit