Dealing with lifelong C-PTSD ... well, actually now understanding it whereas life to date has been coping with and developing personal survival strategies which I now consider a handful of personal super-powers. C-PTSD does develop and manifest as actual DSM-5 neuro-developmental disorders similar to many well-known neuro-divergent disorders. Now that I have come to a place where I am starting to understand and finally (finally, actually it's for the first time) landing on professionals who can actually help ... it's absolutely exhausting.
My therapy (if that's the right word) is borne out of personal trial and error - light exercise, one or two engrossing hobbies, one meaningful human relationship and lots of cats. I try not to overthink it ... and embrace the direction it takes me while actively guarding against its excesses (he says, "with that much shaving soap"). To mitigate against being consumed, I try to do very little that isn't truly meaningful to me, my partner and my cats; that gives me at least some strength to do my job well, which I have to keep very tight control over time and effort ... and have some reserve to give out positively to other people around me.