From my understanding C-PTSD is not just one experience of a traumatic event but it is layered in many trauma's over years. The attachment disorder is usually when you are a kid and they are unable to form healthy secure bond with their caretakers as a result of the neglect/trauma. Causes issues down the road in terms of forming relationships/friendships because people who experience these type of trauma don't trust people after all the people who were suppose to be safe wasn't. The dissociation is the minds way of safeguarding from the trauma it creates a safe place in your mind where you could escape.

I agree it gets hard for therapists to get the right diagnosis with so many symtoms. Many get dx'ed with personality disorders when it's really trauma. T's need to get trauma informed at the very least so they do not harm their patients. Do tests such as the ACE (Adverse Childhood Experiences) is a good indicator of trauma. Trauma informed care is not a treatment either (big buzz lately) it just means they are trained better to spot the trauma and ethnically they have to refer you to someone who specializes in trauma for treatment