That's because it's not just a startup community. It's an amalgam of many subcommunities, including (in no particular order) startup founders/employees, bootstrappers and freelancers, open-source hackers, academics, internet culture / forum mavens, activists, and many more. I think it's probably true that the anti-startup voices have grown, but that's also reflective of larger social trends.

The namesake original hacker culture tended to have a solid anti-establishment streak and valued accumulation of knowledge over material goods, and I think that's still highly represented among the community here

Its a forum literally made by an "incubator" that gets VC investors for startups. People that come to HN to spout anti-capitalist, anti-investment, anti-profits are in the wrong community.

Disagree. HN being what it is makes it especially important that people with challenging ideas speak up. If you're looking for an echo chamber there are better communities.

I haven't been around here that long, but i feel like hn may have started that way but at this point is more the modern version of /. [But not quite as "bad"]. Where we start is not where we end up.