How can I help my ex see that he is not the center of the universe. He had my family rearrange…

How can I help my ex see that he is not the center of the universe. He had my family rearrange arrangements for my brother's celebration of life so he could do his monthly visit with my son...Then once I confirmed everything had been rearranged to comply with the requested dates, he switched weeks completely and threatened to take me to court if I didn't agree and find a way to make that week work. Then yesterday he tried video calling so I called back...6 times with no answer. Today he calls while my husband and I were making dinner. We set the phone up and pulled up kee's chair but my 2 year old was busy playing and wouldn't sit for the call so I get a text asking why I didn't make the call go smoother... um because I have two children and a husband to feed and bible study to get to. ahhhh! small examples of his narcissism