FOR ALL THE FUCKING IDIOTS WHO FIRST PICK MASTER YI

Yi is not only countered by Ram, he is literally counted by anyone who doesn't only have slow in his/her kit and has some kind of burst of his/her own.

Not to mention the gigantic list of items that counters him one way or another.

In short, it really isn't a good idea to first pick Master Yi, you'll most likely just get owned.

(Note, all CAN beat Yi, there is no guarantee though, you've still got to play smart. But either through stronger early game or better scaling late, any one can beat Yi.)