I've worked on agile projects for 20 years. I was using agile before the manifesto was published. The opposite of 'not scrum' is not 'waterfall'. Further, I don't disagree with anything Ken Schwaber outlines in his writings on scrum. The problem is, on the ground, that is not what scrum is. Ken has been fighting that battle for at least 10 years.

If the process is just as often implemented incorrectly as correctly, that is a failing of the process. And in this case that is the most damning thing you can say about scrum. More often than not, people do it wrong. I'm tired of that excuse.