Played Zombie High with a friend today

I was playing Zombie High with my friend, and since I was slacking off and trolling during the story mode, they thought I was bad at the game. So, they challenged me to a 1v1 in Domination mode. After I won 4-0, they went quiet. I think it's because I only used the Skater in the last match to win, which probably made them even more upset.