Afk in ranked

Guys , why people that lose a game gets the same amount of VP lost of a guy that stays afk all game?

Why am I finding at least one afk every 2 match in mine and their team....

The ranked system sucks so bad, the matchmaking sucks, and the VP system suck , why someone that does 18/0/7 gets the same amount of someone that does 0/10/3 , happened and saw that lots of time, this system is totally crap