PLEASE PLEASE - Multiple offending TROLL STILL PLAYING. Nothing I can do to win a game like this

Watch the first 10 minutes of my last game.

Please take the time to watch Riven. Not sure if you can read what she says in chat. But her sole intention entering the game was to lose. This is unacceptable. I have reported this person multiple times to no avail.

Yet if I were to call him a snowflake, I risk being banned. WHAT IS WRONG IN THIS GAMING LEADERSHIP AT RIOT?