Why I think Ranked is unfair!!!

I consistently manage to put on good, scratch that amazing performances in ranked mode in every game. Typically with low deaths and high kills and assists I try to carry my teams to victory but it proves nearly impossible in every game. So i steadily fall down the ladder and get repeatedly demoted due to the faults of others. This is not fair in any way. I should be judged and ranked based off of my personal performance Ex: Wards Placed, KDA, KP, CS, Gold Earned, Wards Killed etc. Giving and taking LP based on wins/losses just is not fair because people that get carried get free LP while the people that perform well while their team throws leads gets punished. And if you need proof to see my performances just check my profile and you can see for yourself. What caused me to want to post this was two back-to-back games that resulted in my demotion to silver 4. (I was placed Silver 1 after provisional games and this is my first season.) First game i was Jng 8/4/15 of course a loss followed by a game as Jng 10/5/32. Both games i ganked early and gave my team a lead early which they in turn threw away and caused us the game. I think if the ranked system was adjusted there would also be less flaming from teammates as everybody would know that their LP depended on how well they did personally and not feel that the feeding bot lane is going to cost them LP even if they do lose the match they can potentially still earn LP by playing well.