I just want him to stay away

My child’s father is the most toxic man I’ve ever dealt with. He has made this pregnancy the worst experience and I try to stay humble and not say much just have peace.. but tonight took the cake. Some things can not be taken back especially words. But not to mention he brought a random girl he’s sleeping to the baby shower as a guest! Then on top of that he was so disrespectful today all bc I told him our son still needs a dresser. He hasn’t helped me to get not one thing for this bby, not one! He’s lied, manipulated, been disrespectful, and nasty ever since I decided to go through with the pregnancy he’s been a different person totally changed on me. I’m tired.. his mouth gets even worse when he drinks. I dnt want him in the delivery room with me anymore bc I’m due any day atp but I feel like he will ruin the experience and make it uncomfortable. Is it wrong to just tell him about me giving birth afterwards? I’m having the bby at a birthing center & they only let u stay 4-6 hours after giving birth. I would rather him just come see the baby after he’s born then be in there with me. I also don’t want my son to have his last name, is that wrong?