This is JMO but Dusty doesn't get the fact that no one cares he is even there. Ryan is the reason they are on the show and that's who most people are interested in. But, Dusty does 75% of the talking and we never really get to hear what Ryan thinks.
Also, Dusty has screwed up at least 2 challenges. The cheese making and this weeks rowing/paddling. He got water in the boat and didnt listen the first time Ryan told him he was getting water in the boat. He just kept doing it until the boat went down. I'm not as nice as Ryan, I would have hit him in the head with the paddle.