Master Yi is broken

Basically, I just finished a game where I was playing Rengar and the enemy had a Yi jg, the game started normal and there weren't any crazy plays happening, I was 5/0/1 and the yi was 0/3/0. I went to take my blue when I found the Yi taking my jg, I engaged and was horrified to find that he was melting the health, he only had part of an item and boots! I was shocked, a feeding jg effortlessly takes out a fed assassin, then for the rest of the game he only got 2 more kills while I got around 5 on top of what I had, and not once during the game could I 1v1 the yi. This has happened so many times and I don't understand why this is still a problem, yi has been a brain dead auto champ that will allow the worst players to get 2 Penta kills per game. I know this isn't just me but all these other champs get nerfs that make them absolutely terrible to play when they didn't really need a nerf in the first place, but yi continues to become an almost unbeatable champ. I hope riot takes this into consideration and fix this broken champion. (i lost the game btw) [sg-ahri-3]