Why Relationships Fail and How to Improve Them | Therapy Series from Benjamin Bonetti. Relationships can fail for a variety of reasons, but some of the most common factors include poor communication, lack of trust, and incompatible goals or values. When couples don't communicate openly and honestly with each other, misunderstandings and resentment can build up over time, leading to feelings of frustration and disconnection. Trust is also essential for a healthy relationship, and when one partner betrays the other's trust through lying, cheating, or other forms of deceit, it can be very difficult to repair the relationship. Additionally, couples who have different goals or values may struggle to find common ground and compromise, leading to ongoing conflicts and a breakdown in the relationship. Ultimately, relationships require effort and commitment from both partners, and without these key ingredients, they may not be able to withstand the challenges and obstacles that arise over time.