League of pathetic mm.

Well just got promoted to plat 4 but then lost 15 games in a row now i am back to gold 2. Gj mm everything works as expected. How is this possible to loose 15 games in a row? How is this mm works as i dont understand it? Its like game tries to punish u for being promoted. It doesnt matter how well u do u just loose. It seems that your hero deals less dmg and takes twice as much. This feels like straight cheating to me. And dont even get me started of filthy boosters with their gold account and premade friends with silver account. How is this even remotely fair? This game sucks monkey balls. Untill ladder games are back to random single vs random single all this is just sham!