Sartre's sequel to 'No Exit' is less well known today

While I appreciate reaching out to philosophers of past centuries to provide us with guidance, in this particular case an absurdist may be more apropos than an existentialist. I'd suggest consulting with Franz. "Franz Kafka typically features isolated protagonists facing bizarre or surrealistic predicaments and incomprehensible socio-bureaucratic powers." (Wikipedia)

Sartre's "Hell is other people" would still be an appropriate conclusion for many -if not most- Uhub stories.