How are these people not banned?

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1937598144/215694819 Why the hell this Renekton not banned? Sure, I don't mean to "steal" his kills and tax 3-4 cs for it, but the shit he done just cost us the game, buying 3 boots, get execute on purpose so many times, why the hell he isn't banned?

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1937580901/215694819 I'm an unraked player, yet I got paired up with four fucking Gold 5, we were winning and about to destroy the nexus, yet somehow, one of them put a FFS vote, I vote no, but the rest of them vote yes, so I lost before the nexus destroyed. are they 4 man premade just to troll me?