And he wants to get in your head and have you thinking of him. He is using his aggressive words to cause a reaction, to push your buttons, to take your focus off your life and your boys and to put your focus on to him.
Don’t give him a reaction. Don’t give him your valuable time and energy thinking about him and his bad mouth. He is insignificant. He is typical of abusers. There is nothing special about him. He does not deserve your thoughts or you focus.
Easier said than done but keep posting for support.