A Idea for a New Ranked System

So i'm sure everyone has been stuck in elo hell for a short or long time. I'v constantly been stuck in Gold 3 for the longest time from feeders and afk's. I'v had a lot of games where I gain 10 lp then I lose 24 lp. So now I am creating a forum to possibly have a new system.

Riot has shown that they can create a code where it shows the stats for a champ and gives you a sort of way to rank how good you did with that champ. So why couldn't they make something similar in that idea but it would also give you the selected amount of lp. This is my idea of how it will work. When you get into the game you will be required to select the role that you will be going. You can only select one of the roles and once you select that role it can't be selected by someone else. The amount of lp depends on how well you do in the game. I'll set a good example first, So I select Thresh then select my category of Support. Lets say I go 2/2/19 ,for any role you don't want to die as often so a death is counted as -1 and the kills and assists are counted as +1. So the total of my champ lp would be 19 and if I won my game then maybe like another +5 lp so my total would be 24. Now an example of a lost game, I'll stick to the same Thresh and Support. Lets say my kda is 0/8/4 now since i'm negative the deaths are doubled so I would have a -16 and if you lost then it would depend on the time so like if you lost from a surrender then it would be a lot of lost lp like -10 but if it was like a average 35-45 minute game then you may lose like -5 lp so the total would be -26 or -21. That is just a example where you go negative you could do well and not lose like -16 lp.

So what does this new kind of ranked grant? Well in my eyes the new system will give you more of a competitive system. Instead of players feeding or intentionally feeding they may rethink what they do and will try to do better and want to win. In my opinion there is not enough discipline in the rank system for people to actually care. Sadly I don't know what to do for a afk, but it wouldn't help them in any way to be afk because they had to do something to go afk, like rage out then leave but if they had to go then you have leaver buster to cover for that.