I was diagnosed with PDNOS 8 years ago. Also DDNOS, which is similar to complex PTSD. Although my personality disorder is not the same as schizotypal I can still relate to what you have written. The loss of humanity -- for me it's more the loss of my "self", the loss of feeling like a human being in a world of other human beings. And chronic low grade to serious depression.

I was treated for trauma and dissociation and that did help me recover some parts of my self, but getting that integrated into a functioning "human" personality has so far eluded me, although I am doing some better.

It's too bad these forums for non-BPD personality disorders seem so quiet. But they have been like this for most of the time I have been on PsychCentral. You might find the complex PTSD or Depression forums more active, and maybe there are things you can relate to there.