That feeling when winning a game against a cocky toxic player

A fed teemo trying to be cocky, bragging and talking trash at me just be cos he is fed and full build thus i had to mute him. Then came the final team fight as he and his team throw the fight which leads my team for winning the game. Then he complain: ashe won 4v5 game noob ashe. When it is clearly 5v5 as none of his team rage quits the game with all of them are lvl 18.