Yeah well CC really lost it by that time period. Besides that he kidnapped Destro and the Baroness's kid and was going to brainwash him to be his ideal son if not for Destro turning all of M.A.R.S. thus his entire life and his other son, Alexander over to him.
But on the bright side, Billy's death lead to CC's downfall. It made Zartan go ahead with his betrayl of Cobra leading the Joes to the base and having the Dreadnoks help them.