Unable to win loot cause of AFK behavior?

What? why? the only game i "left" was one for 4 minutes after a power line cut cause of the heat in my country that it one game NORMAL game for 4 minutes...

And i got punished for that? wth riot?? you punish players for ONE TIME thing...? i dont get it...20 wins in the row yeah sure i need to be punished cause i was afk for 4 minutes cause of power line AND WHEN I COME BACK I EVEN CARRY THAT GAME CHECK MY PROFILE

This is stupid Riot..