Its pretty annoying winning all your games and getting into series

Try losing all your games than winning the series. Mix it up a bit.

leave games that you would lose from team comp or a bad player mmr matters most for ranking up not just trying to win every game you lose no mmr for dodging but lose alot of mmr for a loss your points you get per win are based on the hidden mmr so if u dodge games over lose u lose 2 points but can get up to like 25 per win and down to bout 10 or 5 per loss if u dodge auto loss games

Git gud xDDD