A new ranking system idea

We have all gone through the unfairness of the solo/duo ranked system and the division climb. I know that it is based on team play but we can't pick our team and one person can't win a whole game. Sooo....my idea is to be more fair and still team play to matter in the game. I think that there should be two scores at the end of each game: Team score and personal score and the amount of LP that you get should be summed up by those two scores. I think that each summoner personal score should count in the final LP that you get or lose. For example....if you lose the game but your personal score is A or above you shouldn't lose any LP. Or if you win and your grade is S or higher you should get a little extra. If your team score is high but you still lose the game you should lose a little bit less LP. Even if you don't like my idea I strongly believe that the solo/duo system should be changed. Thank you :)