But it's not really the methodologies themselves as the approach to methodology that is problematic, and of the major “Agile” methodologies, only Scrum really bakes the inflexibility in to the first party approach to the methodology (if you aren't following every jot and tittle of The Scrum Guide™ under the guidance of a certified Professional Scrum Master™, you aren't really doing Scrum.)

Most “Agile” methods are fine starting points for adapting a methodology to your team needs, which is the only thing a published methodology should be if one takes the values of the Agile Manifesto seriously. But the even where they aren't actively pushed as rigid, one-size fits all, certification and standardization driven monoliths like Scrum, they tend to fail to actually address Agile application...