As a millennial growing up I definitely remember the narrative surrounding PTSD. Even for soldiers in war it was hard for the public to understand and wrap their heads around. Even in the late 90s/early 00s, mental health was still a very poorly understood subject in the public consciousness and was just beginning to get the attention it needs, and even though we have a ways to go in that aspect, we are far far better about it as a society than we were 25 years ago.
That said, I too was relatively recently diagnosed with CPTSD resulting from regular abuse as a child which along with undiagnosed autism contributed to feeling like an outsider growing up and even to this day. I am very selective of what I share about my personal mental health struggles publicly but I always advocate that only those experiencing these struggles can understand them and they need as much empathy as we (society) can spare.