Personally, when I feel that a HN thread is too negative. Let them be. It's fine. In most cases, I don't think they feel bad. They simply express their opinion and are fine with expressing a negative one. You can especially tell when people reply to those people. While discussion may get polarized, it's still interesting to read on an intellectual level.

I think voicing your opinion and having food for thought is more valued on HN than most other communities I see. Whether that food is negative or positive, is simply another flavor.

While I voiced my disagreements with this article, I value the discussion (and to some extent the article). Whether I view an article as good or bad, in most cases I value the discussion much more than the article :P

I'm happy you submitted it :)