My opinion of All the Colors of the Dark might have suffered from some post election brain rot. But also, I was able to pick up a subsequent book that ended up being an absolute five star read (Tell Me Everything). Alas, I don’t think that this book was for me, even though almost everyone I know gave it stellar ratings.
The unique and quirky characters were endearing, and the fraught action scenes that set the central mystery of the narrative in motion were propelling in the beginning. But after hundreds of pages of the two main protagonists repeatedly making unfortunate choices with their tunnel vision, it just began to feel like a slog without any plot reveals to keep me engaged. Once the mystery comes together in the end, it’s so convoluted and didn’t live up to the epically long build up. There did not seem to be a great deal of growth, accountability, or self realization on any character’s behalf. 
I think the author was too busy piling on layers of metaphor and flowery language to romanticize the behavior of traumatized individuals to follow through on anything particularly meaningful to me.