I was diagnosed as having AvPD by a psychiatrist back in 2008. I think I assumed that was simply descriptive: I avoid things, no kidding. I've only just found out that it includes a good deal of aetiology as well.
A few weeks back, my mother, amazingly, apologised for being very hard on me when I was little.
(This was prompted by her struggles to care for a close and currently very depressed friend who is now constantly critical of everything.)
I'm not diagnosed as having Asperger's Syndrome, but several people have independently suggested to me that I might have it, so I went looking for information about the effects of prolonged criticism on people with AS. I came across this article on an Asperger's website that was so eerily accurate, down to the "criticising themselves early on in social interactions", that I showed it to my partner. (He said he could see something of himself in it.)
When I then googled "hypersensitivity to criticism", the third link down was to the MSD definition of AvPD. Wow. That just explains so much.
I wish I'd thought to look into this earlier, since even knowing about this has been healing. Whether or not it helps me deal with my fears remains to be seen.