I agree with the man above that jungle is easy to carry but not typically if you're at only at a personal skill of bronze.
From someone who struggled in bronze for months ill tell you my story and what worked for me.
Ive been playing only since around the time poppy was reworked. Well I sucked. I didn't know what was important and any advice given to me I never implemented.
I didnt know how to carry and I didnt understand champions because I jumped from champ to champ. Then a couple months ago I got a new job and my coworker said he played so we staryed to duo. He mained support and I decided to focus on one champ jhin. He was an amazing support allowing me to get fed almost all our games. Because I was playing only jhin I got use to his power and his power spikes. I started to see what items worked better on him I went from bronze 5 to my s5 promos in 3-4 weeks.
All this was from focusing on 1-2 champs. Taking in advice from other to heart. I never realized how important last hitting truly was to scaling but if you are 50-60 cs behind your opponent you're gonna feel it. It's little things too paying attention to yours and your laners mana. Knowing when you're being baited. But most importantly is last hitting. Seriously I had so many people tell me practice practice practice your last hitting, I just ignored it.
Then item builds. I use to build the same exact build pulled from a guide. But not I pay attention to what champs are on the other team and what they may be building.
Learn 2-3 champs, only play them. Practice last hitting, be more conscious with item purchases. Practice With all advice,given to you and you should climb