The Atlas Complex

I... am so angry.
These are my immediate thoughts after reading, so bear with me.
But why? I don't get why this? Why?
It feels pointless to have read this book.
The first 75% of the book, I was enjoying so much. Genuinely was having such a good time, and I was excited to read it whenever I picked it up. So WHY.
OLIVIE, WHY. MISS BLAKE, WHY.
She killed off my two favorite characters of this book. Why would you do that? You made, arguably, the main character so... uninteresting. The motivation felt so disconnected from what was happening. It was characte  deterioration at its worst, like, I didn't like it at all. And like, what was the point? To say “haha life sucks and people are bad”? 
I just don't get it, Olivie. What did you accomplish here? Like, why? Why? Why?
I'm so conflicted.