I agree that it was a horrible thing for the writers to do to both Bash and Kenna.
But, I really loved Kennash. And part of what made them special was the awful way their relationship came about. I love the idea that something good and beautiful can come out of something so horrible. That something with such a sad beginning can have a happy ending. Bash and Kenna's relationship actually made me like both of the characters so much more. When they declared their love for each other, I was so happy for both of them. But... then the writers ruined that, too.
Anyway... I voted in the survivor, Nikki.