I hate to say it, but your matching system is flawed, Rito.
I have never seen such flaws as these.
I will go into a match with random people and we do horribly, then at the end, it shows that my teammates have won 0 (all of them) and the opponents have at least won more than 5, 2 over 50 times.
Can we please have a more fair match making system?
I know that some people can only hope but you should look into making it so those who have 0 are in a bracket between 1-10, after they get past 10, they get put into the 11-100 bracket. This will help with people who are un-experienced to a place to get to know it better with others on the same level. If a player is very good and won 5 or more games in a row, then by goodness they can be in the 11-100 bracket, but do not allow people with 0 wins into a match unless with a friend.
This would be very helpful with Normal and Ranked in Summoner's Rift, also would be nice in ARAM, Twisted Treeline, and Dominion.