Why is my ex being an A** hat?

Detach from this man. Ask him to discuss arrangements about your son through texting or email. Stop asking for pictures. If you can't live without seeing your son, take your own pictures before he leaves. Your ex is using this as an opportunity to show you how great his life is. He's talking to your family to try to build alliances. He's mean to you because he's conflicted. Why did he bring the girl and dump her? He was trying to show you how great his life is AND he's stupid.