I guess I see this two different ways. I dated some dip#### for a long time, about 3 years, same age frame as your daughter. Really thought he was the one, eventually moved in with him after 2.5 years and within about 3 months realized this was NOT it. I'd given up a lot of things for him too during our relationship...a lot at my family's expense (spending all free time with him, choosing holidays and vacations with his family, etc. nothing harsh, but not what my family, especially my mother, deserved). When I finally woke up and got out, my mom finally admitted to me just how much she disliked him. I would never have known how deeply she felt about him had she not said anything. She didn't necessarily hate him, but didn't like how he interacted with everyone, felt he was controlling, etc. She had legit concerns.
However - I'm not so sure that at 23/24 when I was all 100 on this guy, that I'd have actually listened to my mother had she sat me down and talked to me about her concerns. Maybe I would have, I'm not really sure. I think deep down I'd always known she wasn't absolutely thrilled with him though. BUT I always...ALWAYS knew how supportive she'd be no matter what. And I think that's essential. Giving your daughter the feeling that even if you didn't approve, you're still there should she need that safe place without too much judgment or criticism. I do wish my mom had sat me down and discussed a few of her concerns with me, gently and without force of course, but I'm not so sure I would've listened right away. 23 is a stubborn time and I know I've learned a lot of lessons the hard way. I had to figure everything out for myself. This was one of those things.
I feel awful that my parents probably watched helplessly while I learned this particular lesson the hard way, but I am grateful that they 1. let me learn it myself and 2. always gave me support no matter what. My family helped me move in to that apartment and 6 months later, were helping me move out and down to MD...no questions asked.
Also, 23 is just so young to be married