I admire you and women like you who believe they are wanted even though they don't look perfect. I wish I could adopt this way of thinking but I would be lying to myself.
I'm guessing that your father was a piece of work, too. Which helped prepare you to be treated like dirt by your husband. If you stay with him, your DD will be the exact same way: believing that her value lies in how sexually attractive she is.
If you leave, you can work on developing your sense of self and sense of value beyond how your body compares sexually, and your DD will learn to be strong by watching you be strong. Then when her father tells her that all boys and men will just lie to her to get into her pants, you can explain that some men, like her father are like that, but other men are capable of thinking of women as work colleagues, friends, confidants, and so on, and that some men are honest and looking for an emotional connection as well as a physical one.
By the way, I'm in 50s and my DH is still very happy with me. I feel pretty, not in the same way that my young adult DDs are pretty, but in a mature way, with smile lines around my eyes and soft curves. We still have a great sex life. He also really values everything else that I bring to our life together.
What would you want your DD to do? Would you want her to stay with someone who made her feel bad about herself?