Again: I need help to stop loosing games.

Hello. From what I heard "riot matchmaking" is trying to get players to have a 50/50 chance and record, maybe this is not true. 2 months ago or so I was high gold 1 <- Atm Im on my way down to bronze and I cant win any games <-

To my understanding Im currently: 7 wins and 16 losses <- In the last 10 games there have been 3 afks, all in my team <- Every time I play adc with a non-tank support I know he will get caught and feed <- Like previous game where my support player came from a game where he/she had 0-10 stats <- I came from a loss to... why put us in the same team if we both "sux" ?

I broke my only rule on this account "I dont talk" because 1 support started to follow me to mid when our mid went afk <- I asked her to stop follow me, she didnt <- Me trying to explain that in a 4v5 you need to spread out and gain as much global gold and xp as you can was met with "Fuck off" <- Hence why I dont talk in game... This and the fact that I get banned for saying anything in this game.

So, what can I do to end this? I get flamed every game. I have more damage then enemy adc almost every game when I play adc, doesnt matter. I have yet to play a game where I feel I make a difference to the outcome <- As of now I feel like a bot made for losing games and currently missing cs as well <-