Should I hyphenate my child's last name?

Okkk so there is a lot to this than just to hyphenate or not to. I am currently in the hospital 32 weeks 5 days pregnant with my little boy. My water broke so I'm now in here on bed rest trying to hold him off until 34 weeks. But anyways, the father and I are not together but we get a long just fine. The only problem is he drinks every single day and then acts stupid and does crazy things. He was up here with me for a couple days but then I smelt beer on him and sent him home telling him I don't want him up here and I'll call him when I go into labor. So needless to say he is irresponsible and makes horrible decisions. What if I would have went into labor and he's drunk an also he had to drink and drink to get here. Horrible. But I do not want to do anything out of spite, I only want to do what's beat for my son. I am naming him Jayce Noah. What I can't decide is if I want to give him just my last name which is McDowell, or hyphenate it which would make it McDowell-McLean. I don't think McDowell-McLean is horrible but what if the dad isn't even in his life ? I know so many children that don't even see their fathers. And I can definitely see the dad doing that. His brothers have done it with their kids. So why even bother giving my son his last name? Buttt I can't see the future. Maybe he will straighten up when he sees jayce, idk. But anyways, what do you guys think? Hyphenate it or not? I'm also thinking about my sons future. Will kids make fun of him or ask him an embarrass him why he has 2 last names? If my baby would be made fun of andddd I don't even know if the daddy will be around is it even worth it ? I honestly do not even feel like he cares about my baby boy. I think he's just obsessed with me. If only you knew all the crazy things he's done! I have to protect my son. So what do you guys think?????