Some claim to be following agile methods, but are actually doing waterfall.
I sponsored a college student project where the students needed to add security and polish the interface in a prototype. They used a waterfall methodology and their professor was no better.
Had it succeeded, I planned to fly the students to a medical convention to present the prototype. It failed, mainly to lack of communication, and the students quit!
People may have died because this app never got to market.
When I started working at a new company, they demonstrated their software for managing “the backlog.” I told them, “I never have a backlog.”
I used agile methodologies since 1973, when we still used cards and nobody had computers on their desks.