Usually we as the audience tend to root for the female lead and love her irrespective of how meek, lacking in self-respect and annoyingly self-sacrificing she is, simply because we are meant to feel sorry for the emotional tortures meted out to her.
However, mishti today has proven that she deserves the audience's love, not just because she is the female lead, but because she comes across as relateable. but also has admirable qualities that make a girl like me watching her think "I wish I could have the guts to speak my mind and express my feelings like that in front of others". Mishti is a girl who resists conforming, tries to stay true to herself instead of pretending to be someone else just to please others and tries to do what she thinks is right irrespective of whether other's think she is crossing the limitations usually expected of girls.
I think girls out of pressure tend to just agree with what others tells them they should do or what they should be like, exactly as abeer had said that society steals a girl's individuality and forces her to conform, but mishti is not rebellious. She just simply doesn't want society to take her confidence, identity and individuality away from her. She wants to be accepted in society as she is rather than expected to change everything about herself irregardless of whether she is happy or not.
I say rajan shahi and his writers, with special mentions to rhea have done a splendid job with mishti's characterisation. Her character and her desire to protest society's pressure of trying to change girls for the sake of marriage is something that would have even your most traditional indian audience watching at home understand and be on mishti's side. The audience themselves will see society through mishti's eyes and will think there is nothing wrong about what mishti wants or says, that she has a good point.