I believe there are many factors that will determine whether or not a reader enjoys this book. It is a first novel by this author and the reader's age may impact their willingness to immerse themselves in an environment, however fictional, that is, from the outset, purposefully created to be offensive to one's sensory organs. This is, and continues to be, crucial to both the plot of the book and an underlying message.
The characters are realistic and set in what is generally considered to be a gorgeous part of Canada's Pacific Coast, British Columbia. But the events of the book usually overwhelm one's ability to bask in that beauty for long. While the sadness of the characters' lives and the ugliness of their relationships with their environment are not without purpose, it is a tough read.
Including motherlessness, PTSD, isolation, human destruction of the environment and suicide in one book rarely makes for light reading. But it would be helpful to the reader to envelope those topics in a book that provides some wisdom or hope for progress on more than one front.
The author seems to be presenting some positive rationales for suicide, but these characters are all so far gone by the time the story begins that it is just another false glimmer to think that the outcome is anything more than part of the death all around them.