You know why every one hates yi?
Every one hates him not because he can carry hard. Not because hes a Op champ. But because most players that play him afk farm and only fights if every one has 100 to less health. You know you want to just cry when you see him still farming after the enemy team is working on the last tower and about to get that inib. But that's why most hate him. Now yes there are great Yi players out there that farm and gank to get there stacks, or to get items. The the great players work with the team and dive with alpha strike.

support against Yi, watch him explode.
when I play Yi, no matter if I am building full AD or bruiser Yi.
I can still kill squishies very quickly, while being very tanky, enough to not be instabursted late game, allowing Yi to do a lot more things during a teamfight.
might have something to say about this.