Not going to repeat what it was said, but wanted to add something, from someone who had childhood traumas that took more than 10 years of adult life to overcome. I'm talking about traumas that made me had high levels of anxiety, depression, phobias...
From that experience I can say for sure that although your objective was to make some people who have gone through it feel represented, it is not done this way. If I read a story of someone just going through things that traumatised me, the only thing it would do would be bringing the pain again to me.
I've been thinking how to explain how it can be done in a way that actually achieves what you intended, and the only I came up with was with an example from my life. Trying to avoid going to deep, one of my issues was that I was always pointed out as weird. Kids in kindergarten would keep me away and beat me, and even my mother would say to me that the only thing she wanted was a normal child, and instead had a weirdo like me. A story just showing this would only wake up my childhood wounds but... This is the thing, one day, I was with 2 friends by the river. They were talking a lot with each other and I, as normal at the time, was completely silent. After an hour or so, one of them suddenly stopped, turned to me and asked "are you ok?". I felt all that "I'm a weirdo" thing and the other friend just said that I was quiet like that. And the person who asked said something that changed my life. She simply said "Oh, I have no issue with you being quiet. You can be talking non-stop, not saying a word for hours, making a handstand or roll yourself in the sand for all I care, as long as you are well. That's the only thing that matters to me." That was the first time in my life I felt I could be accepted and loved for who I am.
Now, if I wanted to do a story about this trauma that resonated with people who went through it, I would dedicate maybe 2 or 3 spreads in the beginning about the trauma itself, and the rest to that moment, how it changed me, and how I grew from the trauma to being a person who is not only social but also so much loves being me as I am.
I am not saying this is the only way, and you have entire (adult) genres dedicated to seeing dark themes as dark. But those are not aimed at the people who actually had the traumas, those people will avoid those themes. For instance, women who were raped tend to not like to read a story where there are rapes, at least if they are descriptive, is just too traumatic to them. So, I think this is something you have to define I think. If you want to talk to people who have the specific trauma, you should avoid creating a story that will just hurt them more, and go more for a story that gives them hope, and sometimes even a way to help them deal with it. If you want to go for the full dark (and as it was said, is not very good for children's books), then your target public can't be the people with the actual trauma.
I think this distinction is really important to make.