I am so angry

I am beyond frustrated and I really need some insight here. Last season I had the grace of grinding out of bronze into silver, and that took bloody ages. And now this season I was started virtually at the bottom of the bucket of Bronze again. Oh the overwhelming joy. But what I do want to say is this. How is it that I will win countless matches in a row, in a division, and the second I get to my promotional I get every single troll and AFk asswhipe this game has to offer. Today alone I have contended in three... count them three promotionals and every single one has been stunted by afks. I cant even begin to explain how infuriating it is to try and guide a team that is down a player to a victory. I am so tired of the crying and bitching, and the QQ GG. Im not saying I am a gold and Plat player... But for christs sakes I am not a fucking bronze looney who cant keep their pants up. And every time I have a opportunity to move forward I get my ass crammed in due to things out of my control. I try to be nice, I allow people to play my stronges positions in order to promote synergy, and a happy flow. When we are losing I prompt people with ideas or new angles we could try to win at. But it just doesnt work. I dont know what to do, and I am about to lose my fucking bonkers if I cant get out of Bronze fucking 2. I just lost a promotional and it sent be back to 42 points! I just need help, I need advice, I am going to lose my shit because the teams I am paired with always suck and I am tired of it. Absolutely tired of it.