You FIRE them ! Jerks, like the CTO you described, do not become more cooperative over time. It is possible that he is trying impress the investors and co-fou

You FIRE them ! Jerks, like the CTO you described, do not become more cooperative over time. It is possible that he is trying impress the investors and co-founders. Sadly for you, there is no way to win in these situations. So it is best to move on.