Can someone please explain to me how I can get out of Bronze??????

Every game I play either in ranked or unranked there is always and I mean always at least 1 persons on the team who feeds the entire game. I don't know how to win when this happens. I usually win my lane and then try to help mid because naturally there pushed in with no jg help and yes maybe I get a kill or burn a summoner then i go back to my lane to at least get outer turret before I really roam. But even with me doing well or at least moderately so i can not carry the game when the rest of the team only wants to fight and lose. It litteraly happens every time they try to fight a 4v5 because im split pushing or a 5v5 and 2 of them die and the rest want to keep on fighting. Like you just got the shit kicked out of you in the 5v5 and you want to keep on fighting so now there goes the qudra kill. I always have the team that cant take turrets, rift, dragon, baron, it dose not matter what were suppose to do all they want to do is fight and lose every single time even when i spam ping them back and try to direct them to what there suppose to be doing it still is not enough I am always consistently on the losing team. What am I suppost to do to get out of bronze i have been trying for months i have been to my bronze II promo twice and always lose becasue of, yup you guess it a feeder. The game I just played we lost 7 mins in the game because bot lane feed 3 kills right off. I cant come back from that when the bot lane is going to get back into lane and try to immediately fight rather then farm or anything productive. I literally do not know what to do at this point, I am always on the feeder team and no matter how well I do i cant 1v5. Please someone explain to me what to do.