why?

how is it possible to get stuck we 3 bad ppl every game? its suppose to match ppl with my skill yet every game i have to hard carry or i lose..... there is nothing even about this.... no way that i should have to hard carry or lose every game.... every game there is 2-4 ppl that are 2/20 3/30 1/25 combined within 10 mins of the game while im 5/0 tripled teamed all game because they know they the other 3-4 ppl can be one shotted, dont say play better, because i try to get them to group and take objectives but they are so dumb or inexpiencered that all they do is chase kills and die... why is this happening?

dont say or its you/play better.... no im sorry at some point others have to accept that they are bad, or that ppl are really trying and still getting the short end of the stick.... idk i think i should just quit because clearly i cant move up with every game being either i hard carry and try to get 30 kills and take all the towers and nexus singled handed or i just lose because i get 3 ppl at the least that are just terrible.... the other team will get like one bad person, i can make up for one bad person but now LOL feels less about skill and more about which team has the least amount of trolls