Solo Queue

I want to start this off with saying I don't mean Solo Queue as in queuing up alone, I mean it as how the ranked system feels and seems to work to me.

Ive been playing on and off since Season 1 and I have been through all of the updates that have happened since (RIP: Heart of Gold, Deathfire Grasp, Will of The Ancients, etc.) I was also there when the ranked system was switch from Elo to the League system we have now (to my understanding elo "is still a thing" just not easily found out.)

Both before and after the change I feel/felt like ranked was very solo based, as in you carry your team to victory and earn LP or a higher Elo. This is fine on paper but lets dive a little deeper. What if you carry your team or attempt to carry your team but end up losing. Now i'm not saying you lost because it was a close match and a mistake was made and you lost but, more of someone or multiple people on your team went 1/22/5. I don't think you should be held responsible for that person or people for having a bad game.

Lets say the ranked system were to be changed, lets say a system were put in place where the people who did good or helped the team got LP and the people who didn't help the team or had a bad game lost LP. Now this system is kind of in place right now with Mastery system, lets say that if you get an S you get more LP, yes this could work but look at it another way, lets say you or someone else on your team ends up with a score of 23/0/8. You would most likely get an S for a score like this but did you really help your team? This score most likely also shows that the person spent a lot of their time alone or with 1-2 other teammates, they didn't really participate in team fights. I'm sure you can see how the system would be flawed then, rewarding people who don't really help the team but they didn't do "bad."

TL;DR: What if the ranked system were changed to reward those who actually helped the team and did well and punish those who didn't help the team and didn't do good? Whats wrong with making ranked a team based system just like the game is meant to be?

Id like to hear if anyone else has some ideas on how some things could be changed in League, nothings perfect and there is always room for improvement, I'm sure the design team would like to have some feedback on these kinds of things aside from just play testers and PBE.