The internet is basically full of maladjusted people with sad lives. Strong chance that the post you read on HN, Reddit, X, etc is written by someone profoundly unhappy with their lot in life.
And it's not just that those people are more online, they also post a lot more, and don't stop a conversation when they should.
For many years the prevailing notion was that anonymity turns people into dickheads. But they did studies on this, and it turns out it's just that the real-life dickheads just dominate the discussion and the reasonable people post way less
Yeah I think when you see that kind of unhinged negativity that's right, sure, it's a projection. But I believe the internet can be really good as well, it's just you have to ignore the stupidity that's visible and sort-of, idk, curate your experience (?) to be good. Seeing and responding to the best possibilities in any situation. :)