Doubting myself, am I that person? How do I stop these messages and constants setback in moving on?

Hey lovelies, yes I've written in before but what I want to know is what do I do about shit like this? This is what my poor mum is now receiving. This is only 1 of a heap he's sent her the last few months.

Good morning. Maybe your daughter needs professional help to move on. I've moved on & I'm happy. The interesting thing is while you keep promoting your daughter to be nasty to me, in the end your going to have to deal with what you helped make. A nasty bitter & twisted person. I on the other hand will still be smiling & happy. Still got a long way to go through court yet. So keep on doing what your doing. The worse your daughter gets, the more you will have to deal with after. In the end I'll be the one smiling

Seriously if he had moved on don't you think he wouldn't be sending this shit? I don't send him any messages at all except things like yes to a phone call (when it's the time) or to arrange supervised visits. I've been nothing but wanting to move on with life. He's the one not signing for our house to sell. He's the one that cancels visits. He's the one that either bad mouths me to myself or to my mum. He's breached the DV order.
I'm seriously sick of it. What am I supposed to do to stop this? There's DV orders with no contact I'm going to try and get my family on it but seriously it's getting a little bullshit. My poor mum is sick of the shit she keeps receiving. He tried to still control me by saying "you will make yourself available" and shit like that.
I just don't know how to go about getting this shit to end. I'm really sick to death of it. I'm trying to get on with life and he is trying to stop that process. I don't go around thinking of him or thinking of things to get at him. He barely crosses my mind except when shit like this keeps coming! Mum obviously tells me about all this shit and I get shit myself.
I seriously don't know what else I am supposed to do. I feel like no matter what gets said of the court order he still can't just move on and leave me alone. He doesn't mention anything about what's best for our daughter (who is also on the order) it's just all about him. How he feels, how he doesn't like that he has to have supervised cuz he thinks he's not a crap person. Nothing about our daughter and how it's been me and her since she was born. She never been away from me long and even at visits she wants me. Me to play dispite saying you how about you play with daddy it's daddy's visit time.
Anyone have any ideas on how to stop the constant shit we get in messages? Sorry this was very long and a rant. I'm not bitter I'm not anything. I've gotten past the point of Caring for someone that doesn't care for others and that has abused me and my daughter witnessing it and he's also smacked her once. I have a photo of that. The only time I left her with him after that I didn't leave her with him if it was his day off and I was at work. I don't even hate him anymore. I feel nothing for him at all. If anything I pity him and the way he is because he will never change he has been like this for too long and it's the same cycle with different women. I can't change someone like that and I've let go. I've moved on with my life and wish he'd just leave me be. I buy small gifts for our daughter to give because despite everything I feel like she still has a right to give because he is dad. I've always encouraged visits and I used to get upset when he wouldn't put the time in but now I don't care. I can't force him to do them and I certainly don't want to waste anymore time worrying about someone I don't care for. I haven't care for a very long time. I even picked him up for visits when he lost his licence. I literally have done nothing but go out of my way to try and be as pleasant as possible. But now it's strict no talk to me except to organise visits. I send a message if daughter has surgery or something but apart from that nothing. Odd photos here and there.
Sorry I'm ranting. I just don't now what I'm supposed to do and I think maybe am I the person he's making me out to be? I feel like I've been so fair in everything but yet I still doubt myself.