Well for me, I've been called a primadonna, a drama queen, cagey, touchy, sensitive, and many other names all my life.
I spent my teen years planning my death because I'd spent countless nights trawling books and the Internet for answers as to why I just was not able to stay calm like everybody else.
I felt like there must have been something inherently wrong with me and it could not be helped and my only way out was death.
Then I got my autism diagnosis, and I'd done some reading about RSD and suddenly I wasn't gaslighting myself into thinking I was going crazy and I knew myself better and I know that now actually sometimes it's because of a perceived sense of rejection or criticism.
So now I can ask for accomodations. I can ask my boss to warn me ahead of time, I can ask for constructive feedback, I can ask for space and time to process things, I can reassure friends and family that if I do have an OTT reaction that it isn't their problem. That I have listened to what they are saying, and before we continue discussing things I have to take a break because I need time to regulate.
Being called names all your life for something out of your control is traumatic. It really is debilitating.
It isn't just a bit of worry or rumination or upset.
They're all normal responses to rejection. The disordered part is where the reactions are uncontrollable and disproportionate.