I dont get this game something with its matchmaking..

I don't understand how a Gold, a silver, a Bronze, and 2 unranked gets matched against a Plat 2!!!!!!!!! 2 golds, and 2 silvers. And none of this stupid MSR crap cause there is no way the MSR is anywhere close to being even. The kills was 2-15 there was no way it was anywhere close. ..