I don't think we'll ever really know how much this stuff matters, but if leading by example is a thing, they are doing a horrible job. Especially Mitchell. He is an egregious ball hog whose solution to struggles is more hero ball and more hero ball. Rudy, it doesn't really surprise me that his defense is falling off but he shouldn't be asking for more touches to the media.
The problem with this team is so obviously selfishness. These two need to be unselfish first and let the team follow.