Bronze 1 (looking for some help)

I've been bouncing between bronze 1 and 2 for a while and can't seem to carry myself out. I've been to my promos for silver several times and no matter how well I do my team and I always manage to throw the game. If we don't throw the other lanes manage to feed twice as fast as i manage to get fed. Ill admit i have a bad game or two but it seems impossible to do this alone. If anyone could help carry me that would be just great I promise to hold my own and i main supp if needed, if not at least some advice would be awesome. I have a mic and comms please let me know ill add you or you can add me in game Marcq34. Thanks for your time.