How does Ray Bradbury use characterization to show something important about the human condition through Mildred Montag in the book "Fahrenheit 451"?

It's pretty dysfunctional. Certainly Montag has had an awakening of sorts when he meets Clarisse. All his pent up frustrations about his vacuous marriage come flooding out. Mildred is simply leading the life dictated by society. Montag becomes a counterculture rebel. Their relationship is hence not typical in that Montag consistently calls Mildred's pettiness and superficiality (which is the norm) out in private and in front of her friends. I would really hope my relationship was not like this. I would do something to change it ot a end it.