Brenda was a social threat with no blood on her hands. Brenda would've beaten Dawn for sure. Dawn doesn't care that she got rid of a popular player. Her goal is to win one million dollars ($600,000 after taxes).
Honestly, I think she does to a degree. If after the Brenda vote Cochran and Eddie were her targets and her F3 plan was Erik and Sherri then I'd give her some credit. However, she always wanted to go to the end with somebody that played a better game than her under almost all criteria that season.