So Riot better not use 4v5, 3v5, 2v5, 1v5 loses to calc MMR
Feedback system.
RIot thinks you should be lower Rank (coin flip) so they pick shit on your team that afk (you know these players afk ALL THE FUKING TIME) so its not a 5v5 game and you lose. So Riot in its STUPID Wins/Loss is all the matters says "Oh you lost so you should be lower rank" Here is ANOTHER AFKER on your team." Then you lose because its not a 5v5 and Riot says "oh my you lost again so you should be lower Here is more shit on your team"
This is how it works in Gold and below