All S6 had to do was get rid of Chilltown but they chose not to and it was there downfall
James had a somewhat good idea that Janelle, Kaysar, and Howie didn't know what they were doing so he left but chose to become allies with Chilltown which became his down fall but also helped orchistrate the outing of Kaysar and Howie.
Kaysar didn't really care. So he left early.
Howie never really played the game. He just came into the house and acted like his goofy self and hoped it would get him far. It got him to the jury at least.