What the hell is wrong with match making?!

Just played a 40 minute 3v3 match and lost due to the fact that our Master Yi( mastery level 5) went 1-15... Yasuo and myself did the best we could against their teemo, annie, nunu. But this fuckin Yi kept trolling the entire match saying it was not his fault if they get fed.

Like why do you do this to me riot? do you enjoy fucking me in the ass with a 10 foot pole whenever you possibly can?

The best part of this match was they actually thought they were good for winning that.