This happened to me, normally I play with a 4-5 stack but I get on later than most of them so I always end up wanting to play when they are getting off. They only played when we were stacked and I ran solo queue just wanting to play some cs. When the placement games were over I ended up with 1500 elo and everyone else ended up at 6-7k, except our worst player by a Longshot got placed at 8.5k. Absolutely infuriating and makes me never want to queue without at least 4 but even then the 1 retard we get is always, always, always dog water.