When most people hear the word trauma, the common response is to think of big events like an environmental disaster, a mugging or attack of some kind. Trauma often gets associated with something psychical that has happened.
What is less common is thinking of relationships as traumatic and that being with your partner has caused you some kind of trauma. It is not until the relationship has ended that a person can see how traumatic the relationship was. It is easier for people to think of relationships as damaging but harder to think that another person has caused you trauma without their being any level of physical abuse. I feel it is really important that people are able to acknowledge that an individual experience of another person can be traumatic.