Few hours ago I played a ranked game vs a 90% winrate botlane smurf duo.
Me and my random adc smashed them in lane however which is surprising but sorry that's off-topic, minor boasting.
However here is the interesting bit. This happened in my plat 3 promos, and I won the game after that too. I seem to be pared with plat 3 players mostly though.
These guys however, dispite losing that one fated game vs me, they won the next two as expected and already are facing diamonds now. Like what?
They clearly are getting more MMR per win than me, who has a 61% winrate. Why?? They should get the same amount of MMR gain as anyone else.