Honestly, I have the exact same thing.
So, as sort of a forced therapy at least twice a week, I stare at myself as if I'm staring at a stranger. I try to give myself the same respect I would give anyone else. I tell myself that person was once an innocent child that didn't deserve everything that happened to him. That the person in the mirror deserves to be happy and just like anyone else and deserves to be able to dream. That the person in the mirror really just wants to be loved and love just like anyone else. Sometimes I mean it. A lot of the time I don't even believe myself but I still go through the ritual. If I can see a stranger begging for change on the street corner and I can feel their pain, why can't I do the same for myself?
I've always dehumanized myself to cope with trauma. I disassociate so that it's almost like it isn't me that's going through it, I'm watching myself go through the traumatic event.
The mirror thing sounds tacky as hell but I swear it helps so much.