Is it just me or does his blog post only reason is to reassure himself that he's above hacker news as a community. If you want to leave because you see no value in it, then by all means leave. What does it matter if the author thinks HN sucks? I understand the need for valuation of one's actions, but really this sort of statements are just boring.
This article belongs in a tweet: "I'm fed up with Hacker News and ergo, I'm leaving it!". That's the only thing that the author really said, but really, does it even matter?