There’s a set of people on HN that downvote and flag anything that they disagree with. I don’t really understand the mindset, but have noticed they usually agree with whatever the US government, FAANG or other authority is pushing for. (Maybe they’re authoritarian, and that’s why they think anything outside approved narratives needs a downvote? That’s my best guess.)

Anyway, it’s best to treat them like trolls: just ignore them. Upvote anything that renders in gray and isn’t violating site guidelines. I’ve found my best comments tend to wildly oscillate around zero for a while, then end up slightly positive. :-)