I am a little confused here since Mark and Chism are father and son and Chism still lives at home I am assuming that they worked out together and prepped their meals together. What more could he do? On the show he offered to go in Chism's place, but the producers wouldn't let that happen. Even if Mark quit the show to go home with Chism by quitting he would have been ineligible for the at home prize. What more could Mark do?
Sidebar: I do think Mark is being cited as a bully and demanding because of his association with the Queen of Evil, Conda. If this had been another season I don't think anyone would have critized his outburst during the weight in.