Mid Game

Lately I have been going positive early game 3/0, meanwhile my teammates loose lane or die a few times. and end up going 0/2 per person in lane. mid game comes around and I am the only person doing well on my team so I get focused or picked off. My teammates pick p the kills and by late game I am 3/6 and my teammates are 5/4. Soon were in late game and we loose, at the end of game I am getting people blaming me for feeding. Can someone change My View that I am dying to someone who is already fed and therefore im not feeding. I just feel that it is ridiculous that i get killed by fed people and then I get blamed for feeding. Anyways Im on tilt and with the new update I cant even start to play again without loosing ranked games. Any help/ tips would be appreciated because I am so aggravated about this happening in my games i font know what to do. I feel like im wasting time with ranked because no matter how much i climb one day, the next day i can drop jsut as much because of the ecample given.