Of course the rules prohibit flag brigading. If you're saying that political stories are getting flagkilled because politicized users are organizing to kill the ones their cause opposes, then either you have evidence I haven't seen (and I need to see it) or you are vastly overinterpreting the data. Certainly such behavior would be abusive, and we would either penalize such accounts or ban them outright. Just keep in mind that evidence means something objective, such as a post on some external site organizing people to flag something on HN. Posts getting flagged when you think they shouldnt've is not evidence of brigading. It's just evidence that other users disagree with you.

A separate meta section would be a disaster—it would create a dedicated place for the problem to metastasize, and the demands on moderation would go up not down. I once had a conversation with the founder of a forum much larger than HN, who told me that creating a meta section in the hope that it would help contain such complaints was the biggest mistake they ever made.

The meme that HN is declining is more or less as old as HN itself. Maybe HN is declining and we're doomed unless we make major changes (though the prescriptions for such changes are perennially contradictory). I think you're missing a more likely explanation though: internet users just like to complain a lot. Moreover there's a nostalgia bias that always makes it feel like the site was better when you first joined it. (I don't mean you personally, I mean any of us.) Like tree rings, each cohort dates the decline from approximately when they joined the site. It's always the later users, the hoi polloi, who are the invasive species ruining everything—in conjunction with the feckless and ignorant mods.

How about we make this into a positive this way: if there's a specific article that you feel was intellectually interesting, and capable of supporting a substantive discussion on HN, and which was flagkilled unfairly, let us know at hn@ycombinator.com. So far you've mentioned two. In one case we'd already turned off the flags before we saw your complaint (and I think that was because someone emailed us—which is what the site guidelines ask you to instead of making meta posts). In the other case we simply didn't agree that it was an intellectually interesting article that was capable of supporting a substantive discussion on HN.

Moderators have to make these calls in the end because if we don't, the site will be consumed by flamewars. That's a different issue from getting any particular call wrong. If we get one wrong, I'm happy to be persuaded, to admit it, and to correct the error in that case. But I don't agree that the system is malfunctioning and needs an overhaul. I think it's basically functioning the way an immune system has to, which includes being overzealous at times.

I spend a ton of time on the meta stuff and I spend a ton of time on all the other stuffs too. As you'll gather from my several lengthy replies to you, I don't have any problem engaging with specific users' concerns about the site. But I prefer to do it either in situ, or by email. Making meta submissions to complain about downvoting or flagging doesn't have good effects. It just stirs up mobs, in which everyone with a complaint shows up to make it, the discussions turn into the same thing they always do, and it's simply impossible to respond. Don't forget that there's currently only one mod (me) who's in a position to respond publicly.