Funny, when discussing many situations such as poverty, career opportunities, or physical health issues, negative experiences leading to a pessimistic outlook is usually accepted, and met with acknowledgement of inequalities or systemic issues. Suggesting otherwise is sometimes even taboo.
But attempt to share the same kind of experience-informed outlook on friendship and sociality, and the same empathy is rare. This outlook seems to deeply bother people who presumably have had positive experiences.
The means of reconciling this bothersome viewpoint seems to be either insistence on a supposed “friendship meritocracy” (just do these things and have a happy attitude and you’ll find friends!) or by skipping straight to vitriol. The response is fascinating in its own right, really.