It was mostly The Wall
in this collection of short stories that I enjoyed a lot. Had it only been that story (and maybe Erostratus), I would've given 5 stars.
Perhaps for someone with some but limited knowledge about Sartre's existentialism this story is easiest to recognise as a novelisation of Sartre's ideas. At the same time it didn't feel like his ideas are being demonstrated in a overly symbolic way, like the stories are his ideas in disguise. They all feel as independent stories in the first place that can be read differently based on your familiarity with existentialism. Loved all the internal monologue and while reading The Wall
and copying my favorite quotes, I found myself copying pretty much the whole story.