I'm Shocked that a Player like this Exists

Seriously. So, the Swain in my last game: He's my support (I was playing Kai'Sa) We were winning against a Janna/Trist the whole lane We end up taking a bad fight and having to base at a bad time, enemy bot lane takes our turret He starts screaming at our jungler (who, by the way, is 3/1 at this point) for not ganking and declares that he's going to go afk when the turret falls (which it did just after he said that) He goes afk Comes back after a few minutes just to throw a surrender vote Surrender vote gets shot down Now he starts actually moving around but he pretty much just goes to mid turret and sits there doing nothing while we're all fighting just outside the turret Correction: he was doing something. He was emptying out his wards under the turret range Walks into them after we all die and just lets them kill him Says to the jungler "No ganks you lose" even though the whole team has been beating them pretty convincingly and the only enemy that isn't completely out of the game at this point is their Jax jungle Enemy team ends at 21 minutes, everyone reports the Swain, I am fully convinced that if he hadn't thrown that little hissy fit we would've won in just as little time Seriously though. Why????? He literally lost us the game just because we got ganked once by Jax and Malphite didn't also gank us, even though he was getting fed off of other lanes and we were winning ours without him.