maybe there's something about the way she wears her hair or the appearance of her hair and not the curls themselves???
maybe she shld try dating outside her race...
sometimes, when people meet other people who are just off in someway which they cannot pin point, they will say something off the cuff...something like "I don't like your hair curly" when really they mean something else, which they might not know how to say
She needs to build confidence in her hair. She already believes that her curly hair is not beautiful and she is walking around emitting this non-confidence. People can smell that a mile away...I also bet that she believes that in general, she is not beautiful, which is something that stems from something larger and more long term, and not from a few men she has met telling her they don't like her hair.