Riot's ranked matchmaking is utter trash.

I'm currently sitting at gold 3, struggling to make it to plat. Yesterday i was halfway through my plat promos when all of a sudden, with no surprise, the loss streak started because of the feeding players i'm teamed with. From then on i had lost 13 games in a row because of people going afk at level 2, junglers deciding to run it down mid because they lost blue, top laners deciding to troll because our jungler wont gank e.t.c. For 13 games in a row i have suffered from trolling people despite me efforts to win. I had fed my adc and jungler with as many kills as i can offer them playing as pyke, i used my ulti to get so much gold for them yet they still decided to troll me and intentionally feed their team. I have been at the mercy of their terrible matchmaking system for a very long time. It doesn't mater how hard i try or how confident i am in turning a new leaf and starting another game, i KEEP getting trolling players in my games. I'm at the total mercy of this system, it doesn't matter how long of a break i take from the game or if i change lanes and try new champions(ive even tried practising all the champs thinking i can do something) but no im helplessly being pushed along.. Riot has lost yet another player from their game, as if they'd care right?