I Can't Carry As ADC in Bronze/Silver

Alright, I don't want to come out as a snobby bronze complaining about his teammates but I kinda am. My piece of thoughts are that it is actually more difficult to carry as an Bronze player. My friend recently lended me his account because he had stopped playing LOL to play Overwatch full time. He was in Diamond and with his account, I actually promoted him from Diamond 5 to 4.

My friends, who are all Silver, Gold, Diamond often invite me into games and often I play against players who are above my level who are in Silver and Gold and I usually do not under preform.

However, when I play ADC in Bronze 1 and 2, I feel like I get punished by people that feed a lot more so for example, a fed Rengar will one shot me, even if I am at 24/0. I literally cannot carry out of Bronze when other lanes are feeding or if other players are 4 kills ahead of me. Of course, I am nowhere the skill level and a few games that I lose are probably my fault, (not roaming hard enough, not splitting) but I feel like I am not winning or losing elo and this is just impossible.

If you look at my games, you can see that most of my kills come in first 15 minutes of the games and it declines when I try to group during mid and late game.

In case you were wondering about my promos series I went 4-6 (2 games afk and 1 game with a person running it down mid).

Of course, I am just here to learn on your thoughts, what I can do to improve my performance and your thoughts on how I can climb to higher elos such as Gold and Diamond.

Thank You!