Name issues

I might get hate for this but I just need some advice.

I have 3 kids, the oldest is with another guy so she has my last name.

My other 2 kids I had with my recent partner so they have his last name, I was not so keen on the idea as him and I were not married but we were engaged and he assured me that when we got married then we’d all have the same last name.

Well we just ended our relationship three months ago.

I’m also about 6 months pregnant with his child. He was not happy and was indirectly trying to tell me to abort(which he is usually against) or put up for adoption, for the first two months of my pregnancy.

All throughout this pregnancy he keeps saying “I don’t want another child. I dont want this child. I cant do this. You’re on your own with this one”

Well when I got my 20 weeks scan with the gender(its a girl) he was like “ooh what are we gonna name her?”

I actually have no plans on including him in naming a baby he tried to get me to abort and constantly tell me how much he didn’t want this child. I do not plan on giving the baby his last name or letting him in the delivery room (he was no help the last two times anyways)

Am I wrong for this? I feel no remorse for my decision, the only thing I feel like I fucked up on was not giving my last two children my last name.