I don't think Riot actually cares about the state of the game
Honestly...the game is set up in such a way that if one lane does bad against a Lux or Yas and snowballs early, even if the other lanes did okay, its a loss that sometimes you have no control over. And you lose the same LP as if you played well despite probably doing well and watching in horror as your Veigar goes 0/10/4/
If Riot cared, I believe they would adjust the LP won or lost based on performance....and furthetmore, players that CONSISTENTLY perform very far below the average KDA for their champion at their rank, should be banned from rank until they win 3 normals or something, and then they can come back to ranked.
We shouldn't have to have our time wasted because someone is playing bad. There is a difference between having a bad match, losing your lane early and ending up with a score of like 5/7/6 and going 0/10/4. You have to TRY in order to do that poorly and those players should be punished because their presence ensures an unfair match where you have almost no chance of winning.
Now lets here all the nerds try to tell me why the above mentioned is a bad idea.