DP and I had been together for seven years and had two DC under 5, when I left him ten weeks ago at 26 weeks pregnant. The reasons were pages long; he literally had nothing to do with the DC (besides in front of others), they didn't listen to a word he said - if he even spoke to them, they hit him, he expected me to do all discipline, bedtimes, night wakings and parenting and to just play with them occasionally. He'd be glued to his phone constantly and was a complete spectator in our lives. The DC would follow me everywhere if he was around and barely acknowledged him besides to moan at him. He couldn't keep them safe and both DC almost had serious accidents as a result of his lack of parenting.
Since the DC and I have moved, DP has rented out his house and moved into a bedsit to save money so he cannot have the DC there - it's part of his tenancy so he knew moving would mean he could never have the DC there and moved anyway on the basis that they wouldn't want to see him alone 
Every day he sends lots of messages asking what we're doing and when he can come round or out with us. If I don't reply, he sometimes just turns up. The DC don't ask about him and have been much happier since moving. On the occasions he has come round or out with us, he still spectates with regard to parenting and mainly spends his time asking how he can win me back.
He's still undermining my parenting but using the excuse that he doesn't see the DC much now so he only wants them to think nice things of him...! Yesterday the youngest ran into the road because he was refusing to listen to exP to hold hands and he wasn't even reprimanded by him.
I know if I say I don't want him in my house or for us to all go out together then he probably won't see them anymore, or if he does then I absolutely cannot trust him with their safety. As for the birth, I'd been hoping for a home birth but now it's been refused. I want him to have the DC while I go to hospital but he's saying no because they won't accept him and I'd be better off getting my friend (who's never looked after them) to have them while he comes to the birth. But to be honest, I don't want him there and would just be pissed off that he's not helping with the other DC like I've asked.
Do you think it's unreasonable to make my own plans regarding the birth and to ask him not to turn up unannounced at my house? I wanted to move to be separate but I still feel responsible for him and resentful that he still can't/won't parent. I feel ten weeks of trying it his way is long enough but also worry I may be being unreasonable because effectively by removing myself from the equation I could be removing the DCs dad from their lives.