Relational trauma can be another way to describe abuse and a myriad of other things including but not limited to: physical abandonment, emotional abandonment, emotional enmeshment, issues of self esteem, and boundary issues.
You've heard the tale before, "sticks and stone can break my bones but words will never hurt me." While we would like to imagine that we're "strong" enough to withstand verbal assaults, the reality is that it is often within our most trusted relationships, where we can incur the most severe emotional trauma. You may have realized the ripple effects of relational trauma and how the hurt and pain has crept into various areas of your life--even shaping how you interact with people in the present. The truth is if we don't learn how to heal from our past relational traumas, we often bring them into our new relationships.
Also, you may find that the relational trauma you've experienced has shaped the person you are today. While it has brought about strengths, you may struggle with other identified "weaknesses," whether that involves self-esteem issues, body issues, perfectionism, boundary issues, etc.
I speak from personal experience that one of the best decisions I've made is to process and work through all the relational trauma's I've experienced (and I'm still working through them!). It is hard work but it is important work that I know will make a positive impact, not just on myself, but for all the other important relationships in my life.
You don't have to feel dismissed anymore or to be told that what you went through wasn't "significant enough to get the help that you need." It takes great courage and bravery to start that journey of walking through your pain--would you consider taking that first step today to investing in healthy relationships in the future.