Matchmaking is terrible?

http://imgur.com/vb2zPe7 I will fully admit I am absolute garbage at this game and deserve Wood 5, so why is there a Plat 5 in my game? And why was every lane a heavy mismatch? Top: Bronze 3 vs Silver 1 Jg: Silver 5 vs Plat 5 Mid: (Not really a mismatch) Silver 5 vs Silver 4 Bot: Level 30 vs Bronze 2 (take a look at damage comparison and you can see why it wasn't fair) Supp: Silver 5 vs Silver 2 In none of these lanes was there an advantage for my team to capitalize on skill-wise. Some how we managed to do pretty decently, so maybe there MMRs were dipped, but still it's annoying to see how one-sided this match was meant to be.