Acharya Prashant explains that the dissatisfaction people feel in marriage often stems from unrealistic expectations and a lack of internal joy. He argues that if an individual is not joyful within, no other person can enter their life to provide that happiness. He critiques popular literature and romantic philosophy for misleading people into believing that a magical partner can transform a rotten internal state. The speaker suggests that most people were discontented before marriage and remain so after, viewing marriage as a mirage that fails to address the fundamental problem of the self.