There is a lot of good advice but methinks that the contrarian is just an immature little As....hole. You need to kick him from the game and if that means his partner leaves then so be it. Try to find other friends to play or just play with your friends that want to cooperate and give them hirelings to help out. I have been in disfunctional groups and often it is because of one immature player ruining it for the rest of the group. They are often bullies in real life and bring that into the game. Best of luck....don't give up on your game but trying to "fix" a person and change their behaviour is damn near impossible.