Well, I'm a bit biased since I wrote a long love letter to Saigon and then 10,000 words about where to stuff your face there, but I disagree. The piece seems to funnel one person's (bitter) experiences versus writing something that actually extrapolates to the majority. While there is the required "but here are the good parts" the headline seems hyperbolized. I've never been charged more when pulling out a wad of Dong; every time a moto taxi tries to charge more, I'd just keep smiling and insist on the real price, and they would almost always agree with a smile too, laughing at my persistence (this was based on instructions from another traveler who loves Vietnam -- "keep smiling, keep saying your price, then wait."). Sure, there were times when people tried to charge more, same as there were times in every other country I have visited. But in meeting other travellers along the way, or in the emails I've received, I've never had anyone say that they won't return. To the contrary, they are always sad to leave.
Perhaps that's merely a confirmation bias of my own writing, but with the exception of Nomadic Matt's post a few years ago, most long-term and short-term travellers I have come into contact with loved it there. Sure, it's different from other SEA countries, but each have their own history/culture, and I found Vietnam to be lovely. The piece seems to have been built around the headline vs. the other way around?