AFK/Ragequitters..

I'm so sick and tired of losing my ranked games because of some kids deciding not to play or inting because they had an argument with a teammate. I spend 30-40 minutes of my time to win a game and then some kid decides to afk so I lose a game and lose 15-20 lp? I'm so sick and tired of this shit and if riot doesn't take this shit seriously I'm leaving this game