How LP lost/gain could be.

I speak for everyone when I say League is a team game, all it takes is one bad person on your team to ruin a game. My issue is this and I'm sure everyone can agree. There is NOTHING more depressing then getting a Rank A or S and lose about 15-20 LP a game. When you WIN a game you gain what maybe 8-9 points if you lucky perhaps more. Three games later you get that one player who wants to try an LCS build, or a champion they have no clue what they are doing and boom you lost and those pass three games you did were for nothing.

I believe your rank in match should determine your LP Gain/Lost. If you are a support that is warding none stop, getting assist, healing your team and helping with plays you should get more LP (provided you didn't die 12 times with no assist). If you that teammate that was an S rank who went like 13/2/6 but still lost you shouldn't be punished losing soo much LP cause you had a teammate that may have went like 2/10.

And I'm not saying the rank HAS to be like it is, and I'm not demanding that the changes be done, but I feel since Riot holds every summoner to their actions why can't they be held for their own LP lost and gain? Here's just a ROUGH idea S rank 11-15+ A 9-11+ B 7-9+ C-5-7+ D-5+