This build is just here for the memes, if you wanna have fun but also not feed this is a really good build. With the items provided you still deal damage just not as much as you could with a normal build. And the speed you get will help you escape many situations and dodge all the enemies attacks.

Racecar Jhin is very simple, to get the movement speed all you need to do is crit, the later the game the better as you will crit easier and easier.