I voted no.
This vote is based on my experience (give or take sixteen years of PTSD at this moment).
It does get better. This is partly due to experience - every time you go through an episode or experience a trigger, you try to figure out how to deal with it, and then you use the best strategy the next time. So you develop a good toolkit to manage symptoms.
It is also partly due to age - it has been my experience that as you get older, you become more patient, and you learn to see things from different points of view. You know that nothing ever is permanent, just as nothing and nobody around you is completely permanent. So every episode you have, you learn to see that it will pass.
However based on my own experience I cannot say that the uneasiness in the brain, the basic mistrust of people (in my case from childhood trauma) ever goes away. I don´t know if this is more true for CPTSD than for "regular" PTSD. If you had a good childhood, and experienced a traumatic event later on in life, perhaps your chances to overcome are bigger, as the brain might be able to revert to its previous state (just a wild theory, nothing I can prove).
However with children who go through a prolonged traumatic event, lasting years, I´m not sure that a complete reset can be achieved.
No reason to despair though. As I said above, time and wisdom does heal most of it.