Should there be a change to the way LP is earned?

I think that the way LP is earned is kind of crappy. If you do really well but have a teammate who is having a bad day or are with a troll why is it fair that you lose the LP for their bad game? I thought it would be a good idea if they started doing the LP based of the Score you make in the game. Not if you win or lose but if you make like a B or higher then you gain LP if you make B- or lower you lose lp. No it isn't perfect but I think it will make a lot of players happier. In this way you are not punished if your teammate is having a bad game. Maybe you don't get as much lp if you lose the game but you still avoid the 20 lp loss for losing the game. I think this will make a happier community for those who actually try their hardest in the game.