I think his last line sums up his message: "This isn’t an argument, just nonsense." My interpretation of that was that he is protesting the act of arguing about what makes good software design, and calling it nonsense. But then again, maybe his entire post is just that, nonsense.

(If anyone has a better explanation, please feel free to correct me. This was simply my best guess)

The last line in the post, I believe, summarizes the post.