Feeding, AFK, and a Win?

Today I played a game in which the Vayne fed 21 kills with 3 cs and 2 assists. Then the Vayne left. It was a 4v5 and we were down 8.5k gold at 19 minutes. And loe and behold. We won? I still don't understand how we did that.

But the moral of this story, I had given up. My team forced me to play and we won. So don't give up in a 4v5 or 3v5 game though that 3v5 I had a few games ago was stupid on so many levels.

On a side note... I learned the right way to play Daina. Nashors, Zohnyas and jungle item and the rest tank. That was pretty scary!