Matchmaking Messups

So I just went into a match with my unranked lv 28 friend and G3 friend; I am S4. I was matched with two other unraked people and the opponent had two diamonds, and three platinums. We were demolished and wasted my time. The match before was not as bad but still same outcome. Now, I can hold my own against golds and plats but when I get an unranked support with my silver self against two diamonds, I don't think I can do it. Is there a way to get the matchmaking system to get me an actual match? Or am I doomed to be paired with unfair teams?