How bad is match making?

I am silver 2 currently and I was in a game with gold 5s and a few silvers which is fine but on our team we had a mid laner who according to is still level 29 now so he must of just turned 30 and started ranked...Why is there not another unranked person in the enemy team? they had a few silvers and 2 golds we had 2 golds 2 silvers and one person unranked with no ranked wins at all? How does that work? He went 0/14 against a talon and the game was lost which is whatever but why is the match making so bad?
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