I spent 20 years in depression, feeling like life was meaningless and I was just waiting until it was over. Anhedonia meant nothing brought me joy or pleasure or interest. The best I could have was not having to perform normal. Just sitting on the couch watching tv and eating was at least like putting down some of the weight I was lugging around looking like I was functioning. But still ... I still felt bored by the meaninglessness of everything, and the effort life demanded of me - and for what?
Not wanting to devastate and destroy my mother is the reason suicide was off the table for me. I thought about it a lot, but usually in the context of "it seems like the solution. So why am I not? What is stopping me? How bad would it have to get before it became a real option?".
We all have our own stories, histories, journeys. My 20 years of depression and anhedonia and meaninglessness finally lifted when I discovered that my mother AND father and both NPD, my boyfriend of 8 years (whom I thankfully had broken up with) was also NPD (we return to what feels familiar), and the one person who made me feel safe as a child/teenager was a male teacher who I hadn't been allowed to be close to of course (I know appropriate boundaries), and whom I had lost with great devastation and grief when I finished high school. 20 years later, finally understanding, I went and found him.
When the important and meaningful thing wasn't allowed to be important and meaningful in my life, nothing could be.
Life is still life. Ups and downs and challenges. But I am alive again at last. And that awful 20 years of waiting, hoping, seeking, trying to sort myself out and feel like life had meaning felt like a really long time to wait. But now.... I am so proud of myself for sticking with life and making it through that huge darkness, and arriving here were my life finally feels like it makes sense again.
Don't know whether any of that gives you anything for your own reflection on yourself. Maybe, maybe not. But it's what I've got.
I really hope you can find your way through and to meaning for yourself.

I'm so sorry this cPTSD mess happened for you. It sucks so much, and is not your fault.