Ranked Game System (LP Points)

So im currently a solo queue player in silver V climbed from the hell elo (bronze) this season and i think a lot of people can relate to this, the fact is that no matter what you always get that one guy who will feed than will lose interest in the game ...basically trows the game. So what i want to propose is the creation of a system that when the game ends it evaluates the amount of farm you have and you kdr and defines how much LP you lose or win, that way the best players could climb faster and the players that usually feed and trow the game would lose more LP. For example if you end the game with 200 cc and a positive kdr of 6-2-1 but you lose the game the system would evaluate that and that way you would lose less LP. In my opinion i think its a good system and over all a fair system. i Would like to have some opinions be free to comment. Thanks !