How to lose a game

Hi guys, yesterday I played a Twisted Fate game and we were doing pretty well the whole game. But in the late game, the enemy Fiora started to delete me, so I got myself a zhonya. In the last teamfight, I tried to bait the Fiora W, so I picked a blue card and threw it on her, she used her W and she wasnt supposed to stun me because the blue card isnt a negative effect, BUT our Ivern threw his Q at her, and she blocked it, which resulted of her W doing a stun on me. I was stunned and died, and I had zhonya ready. My team flamed me for that lol. We lost the teamfight and the game, according to my team, all my fault -.-