I believe it highlights how one action can trigger multiple consequences for other people. It's written in a way that makes you wanna keep reading. Very short story that can be read in an hour or two. Narrative is non linear.
I never DNF but I almost did with this one because it was so fucking depressing at the beginning. Later on I did enjoy the protagonist's stream of thought and her choices felt valid. Predictable plot though. You know what's going to happen but you can still enjoy the journey.