you have 9 average deaths and 3, FUCKING THREE average cs per minute. WTF. you just stare at the minions die????
your itembuilds are stupid as hell aswell. iceborn gauntlet first item on nasus.. (besides, dont play nasus if you cant fkn farm)
first item bloodthirster on ADCs (i dont know why so many people do this.... WTF), aswell as going shiv instead of PD where that would clearly be the better alternative, going (almost) full ad lee sin jungle, never, NOT EVEN ONCE changing your trinket or upgrading it, going 3 offensive items on Vi when losing (WTF was that BF for???), rushing hydra on zed and not buying bork whatsoever, going AP leona support, going heal exhaust volibear with first item rylais (??????), playing ignite TP volibear for whatever reason when going fulltank...
to wrap this up: you have low kill participation, low KDAs, incredibly bad farm, even on farm heavy champs, and your itembuilds are poor at best. its not bronze holding you down, its your skill.