how do i carry?

Let me start this off by saying this isnt a " i deserve to be gold but stuck in bronze because of noobs" type rant, i understand that im stuck in bronze because i need to learn how to carry these kids, but i honestly cant figure it out. Mechanically and strategy wise i would say im probably on par with your average gold 4-3 player. i always apply huge amount of pressure early game and take objectives at every opportunity i have and for the most part whenever i have decent laners and we are winning after the first 10 minutes i win 95% of the time due to having a pretty good idea on how to snowball an advantage ie: nonstop ganking, taking drags, and counter jungling to starve the enemy of gold. but i have no idea in hell what to do when my lanes feed. once again i dont mean this in a cocky way, i know its my fault for losing because i dont know how to make a comeback. For instance i lost a game tonight, here is the situation, 10 minutes in i am about 3-1-2 lanes are doing decent. i gank mid kill the enemy leblanc and meanwhile our botlane gives up the double kill, our sup annie starts raging and saying im a bronze noob for never ganking despite literally ganking 3 minutes ago. anyway so they dont rage anymore i just go to gank bot, i cant get a kill but force them to back, while this is happening top gives up a kill. what do i do in situation like these were everytime i gank the other 2 lanes get killed or forced out of lane? because i dont know what do and i always get blamed for not ganking despite ganking literally ever 30 seconds. its been 65 games and ive only gone from bronze 2 to 1 and its really depressing because i play good every game, but like a said i dont know how to carry and i know its why im stuck. and it seems to go in sprees i went from bronze 2 to almost silver promos in 2 days winning about 80% of my games, but then ill get 5 games in a row were all my lanes lose and im back to bronze 2 :( (my mmr is low i think because i always get demoted at first 0lp loss). anyway im just looking for advise from high elo players on how to carry, im a good player and i feel like i can get to gold but its really a confidence shrinker when you have 33-33 w/l ratio despite playing good everygame. and once again lol im not blaming this on noobs or troll, i know its my fault for not knowing how to carry.