At least I thought I wasn't - this was billed as "The diet that really works". And that's what I was here to read, and then I didn't.
You want to write "personal insights about the man who made the diet that really works" no problem. I might even like to read it - but that's not what I was expecting.
You say you are writing about a diet, then do so, or change the title.
As eugenejen mentions below, this is an article from the Sunday Times in the Life & Style, Women's section. Perhaps instead of saying "this isn't what I expected, it is crap," you could be a little more aware of the context of the article.
It was a fine piece of writing, I enjoyed the short read.
Headlines are the last thing written, typically by someone other than the article author. Headlines are space-constrained and compete for attention by pushing a 'hook', rather than providing a perfect summary of what follows.
So if you feel misled by an attention-stealing headline, blame the headline, not the article.
At least I thought I wasn't - this was billed as "The diet that really works". And that's what I was here to read, and then I didn't.
You want to write "personal insights about the man who made the diet that really works" no problem. I might even like to read it - but that's not what I was expecting.
You say you are writing about a diet, then do so, or change the title.