Match maker screwed up
So don't know if this was a fluke or not as I don't queue solo much in normals, but I just played a game where I was placed vs a diamond and plat with a few noobs on there team with two unranked, a silver and a bronze on my team.
I mean don't get me wrong, I enjoy playing against higher ranked players from time to time and I don't mind having noobs on my team, I'm a pretty easy going guy, but chance of my team being able to win something like that is 20% at best, probably far lower. Ward pressure alone would be enough to win the game most of the time not to mention superior objective control, ganking, and better team-fight mechanics.
Just seems the match-making system should have a built in feature where it makes sure if there are plat+ level players it ensure there are at least an equal number of gold+ players on the opposing team to balance things out.