What does the reader learn about the state of Montag's and Mildred's marriage? What clue or idea does the author give to support it?

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 is 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.Our first clue is Mildred trying to kill herself at the beginning of the book with pills. Montag doesn't have much of a reaction.