Simple solutions work

Why is this still a mystery

Large project failures follow a depressingly repetitive narrative.

Symptoms are used to cast blame and Causes are ignored to protect the incompetent and their oversized egos.

There is a simple solution, change the management involved in the project.

Albert Einstein said "The problems that exist in the world today cannot be solved by the level of thinking that created them."  - the same is true for all projects that become problematic.