Maybe it's not the parts that need to be worked on, but just the ability to rely on yourself??.....
maybe you become stuck when your T. tries to work on "parts" because that's NOT really what YOU need??
I hope it's all right to say this--

-- it just seems to me from reading many of your posts that there is a great level of dependancy you have on those that you deem your rescuerer. Seems you keep depending on them to take care of your upsets-- when, as an adult-- it's mostly up to the individual to calm and comfort oneself from childhood upsets.
I could be wrong on this though-- as I've NEVER ever depended on anyone to make my life better.... no one was ever there, and those that were supposed to care for me did the
most abuse/damage.

(father emotionally absent, mother a time bomb-never knew when she'd go off, older siblings and their spouses abusive)
Is it possible for some to heal? I think that healing has varying degrees...... so I can't answer that --as I don't know what degree of healing you speak of.
but- with that said, I do believe that one can have a better life .....
I am a little less suspicious of people than I used to be.... (don't automatically fear they have a gun, or are going to hold me against my will, or hold me down and hurt me)..... I still get fearful but not to such the degree.

and I am trying really hard to not "disappear" as much, as I learn and understand some triggers better. (I still lack a single friend IRL-- but with help I"m working on that as well)
Do you know what triggers you? I believe that has helped many people-- to know that the trigger was from back then-- NOT in present times.
anyway-- I'm sorry you are having a hard time.

I admire you much for all the hard work you have done.

and I hope I have not offended you with anything I've said...... certainly was not meant to.
fins