How does the writer use language here to describe Hazel's isolation and despair?

My parents came in then looking expectant and i just nodded and they fell into each other, feeling,Im sure, the harmonic terror that would in time come for them directly. I called Isaac, who cursed life and the universe and God himself and who said where are the goddamned trophies to break when you need them, and then i realized there was no one else to call, which was the saddest thing. The only person i really wanted to talk to about Augustus Waters' death was Augustus Waters

It was unbearable. The whole thing. Every second worse than the last.