He doesn't sound like every mother's dream for her daughter to me either.
The thing is that although you and I can clearly see the red flags and that this doesn't have a lot of potential for a healthy relationship...in the end it is your daughter's mistake to make and lesson to learn from.
With or without this man, she's still your daughter and she knows how you feel, so maybe just let go of the anxiety and keep your conversations with her about anything else.
Hugs