He lost power and has an ego larger than Jupiter.
It probably also became obvious to him that James removed him to take his job.
Cuomo found himself in his own trap, endless legal maneuvers, costs, time, embarrassment, media. This could take quite a long time, keeping him away from politics. Kinda like being in legal quicksand.
On the bright side, Fredo said he’s available and 60 minutes did a puff piece about his availability, so maybe he can find a date and double with Fredo.