The title is "The Worst Outcome is a Mediocre Success" and that's what this is about. How is this deceptive? The "substance" part might be debatable. I personally don't think every post has to go in-depth on everything. I enjoyed his nugget of insight.
It's deceptive because the title is being used in a way that you would not guess without reading the article and suggests highly that it is referring to something completely different. "Mediocre success" is not a synonym for "ambiguous result" and in context most would assume it is referring to financial success.