The article even states this is a thinly veiled ad for some other "method".
The agile manifesto is fantastic. Scrum can work wonders as a means for providing a framework to hang "agile principles" onto.
Most organizations don't do "scrum" well or quickly lose sight of the "why" behind it.
Companies are gonna company at the end of the day. Process + bureaucracy + buzzwords + ill-informed management + vendors promises + shit customers/product owners = late projects.
Agile done right, works. The benefit agile has over waterfall(the process it replaced in a lot of places), imo, is that it's predicated on working software, responding to change and working collaboratively/iteratively.