It sounds like your beliefs are impacted by selection bias.
https://en.wikipedia.org/wiki/Selection_bias
If you're posting about and looking at/for discussions of those who are single/alone, naturally, those who are single/alone are more likely to post and comment on them than those who are not single/alone, and so the samples that you are drawing from to form your conclusions is skewed.
Additionally, I notice that you generally have a tendency to have a bias towards the negative. Not that there's anything wrong with that per-se: a glass half empty and a glass half full are both equally valid ways of describing the same thing. But I feel that you are discounting examples provided that run counter to your beliefs, which would be a form of confirmation bias.
https://en.wikipedia.org/wiki/Confirmation_bias