Breakups are never fun, but a normal relationship is much easier to get out of than a dysfunctional one. What makes a relationship toxic is that one or both of the people involved believe that purposely hurtful tactics are justified when it comes to getting what they want. Healthy relationships come when both people have an appropriate sense of self-control.
The more hurtful the tactics being used, the more likely it is for someone to get traumatized. Trauma is emotional damage that sinks deep into one’s psyche and is hard to shake loose. If you’re traumatized as a result of a relationship, then that means there’s damage you don’t know about or understand that carries forward into your future relationships.
Say you get into a relationship with a traumatized person. The trauma can be so bad, that even knowing that the other person is powerless to stop their behavior, you have to end the relationship over it anyway. It takes a special kind of person to be able to take someone else’s trauma in stride.