Tech itself has become more negative lately, for a number of reasons. HN remains a marvelous place - I was just last night enjoying the variety of posts and discussion. I’ve not found anything like it elsewhere.
In many cases this sorts itself out in a few hours as downvotes rank the page. Luckily here I suspect the flamewar detector has kicked in and the page is being downranked.
FWIW I don't find this in other tech spaces though they usually have a lot more young people. The media coverage of tech has certainly become focused on negatives, but if you hang out in Discord channels or talk with random Bluesky/X builders (keyword is builders here) there's definitely a culture of just talking about building or the more "financial" market analysis aspect. I agree with GP that HN has hit a pretty strong downward trajectory at this point that probably disincentivizes more rational commentary on topics that HN gets a lot of hate on.