It's absolutely miserable isn't it. People see a headline, decide they have an important thing they must tell the world and just blurt it out. Imagine doing this in conversation. You'd overhear a fragment of conversation and just interject with some semi related bullshit that makes you feel smart and then leave.
People on HN spend most of their time congratulating themselves on how they aren't like other social media platforms, but do the exact same crap anyways.
When it comes to technical discussions, there are so many people on here just regurgitating what they read on an earlier thread. Maybe to test if what they heard was true. Maybe because they just want to sound smart. Not a lot of people actually trying things.