As a teenager and even now, I am more interested in talking with men than women. I have never worn make-up other than a touch of lipstick, but I never felt that I was not a girl. Without make-up and interested in sports and politics, I still fell in love and became happily married. Perhaps if Brid had had a healthier loving relationship with her mother, she would not have felt so different.
P.S. Other participants have made an excellent point. Her mother groomed her to be the "soldier" of the family so she tried to follow that path to win her mother's approval.
Also I agree with someone else who said that Brid the daughter did not seem to be the same character as Brid the mother.