I'm handling his lawyer disagreeing with me about custody arrangements. I am NOT currently handling him painting me as Evil Child Stealer. No one is slandering my character yet. I don't want to have to handle that. But I do not have to worry about that yet.
Ignore. He works for his boss -- your soon to be ex.
Keep your nose clean, get through the process.
Get your own lawyer caught up with all puzzle pieces. That's YOUR focus.