Seriously how do I carry low ELO?

I am really busting my balls but it seems that even if I get the advantage I push we do well but then team wont group and/or they go for wrong objective so then when its team fighting time they do something dumb like fight when im not there or go for terrible engages and then that throw away all of my lead and from there we just get stomped. Im not saying im great but I do win lanes and I out farm and kill my opponent almost 90% of the time. How do i carry 4 scrubs or 3 and an afk because it really does happen too often. Ive noticed I generally do better as a jungler but when I ADC even though i still get kills my support doesnt ward. will feed. take cs for no reason. KS even though im at almost perfect farm and already have 2 kills. Like i wish i wasnt exaggerating. And not to mention they have no clue what a tower dive is. I have literally 0 faith in my team and just try to play as though I am only carry unless I see a good CS or they take the right objective then I have some faith. When i shot call and they listen we typically win but even when im 6 0 4 and they wont listen to me I dont get it? I just started playing ranked seriously last season just played like 14 games and got to silver 4. Now my placements got screwed because with the new que i accidentally played ranked instead of draft and didnt catch it. So i lost placement 3 and 4 baddddd which set me in high bronze then i supped terrible adcs and it just spiraled. I shit on the bronzies in B3 right now and I know i will get out eventually. But all of these crappy games like why dont they listen? Why do they afk? Why even play ranked knowing I will have to play for a month or two before i get back to where i started last season?