WIN Streaks and LOSE Streaks
I first became aware of this by noticing it with my games, then when I looked up other players I saw the same thing. If people tend to play a few games in a row when they play, they are either on win streaks, or lose streaks. Rarely any in between. There are games where even if you feed, you'll still win, and games where no matter what you do, you'll lose.
Reasons why you win, is you'll get smurfs or w/e on your team that will just carry the game single-handedly (if you do your part), players who recently just started player ranked again and have a huge mmr discount, etc. and then when you're on your lose streaks, you'll have someone who dies twice then shouts 'open mid' while they afk at the fountain occasionally wandering around the jungle and last hitting minions simply to avoid leaverbuster, flaming the whole time.
I can't be the only one this happens to, and I want to know why matchmaking does this. Does anyone have any answers to this occurrence?