Serious Problem ~ Reset your MMR and start a new.
One thing that Blizzard did right in the old days was reset the PvP MMR to create a new slate when it comes to their World of Warcraft PvP, Players maintain that past MMR and allows them to climb into divisions they shouldn't be able to. We all know what I'm talking about when I say this. I'm speaking about the boosted players in League that ruin the game for 100% of the community especially when attempting to learn the game and understand the concept.
In no way am I a pro or a great player but http://na.op.gg/summoner/userName=my+adc+is+stupid, I'm attempting to learn the game and boosters or boosted are ruining my experience with playing the game.
Riot Please fix your match making system. make it where each new system restarts everyones MMR. If you're good enough you should be able to climb back up just like everyone else..