What actual damage have DEI programs caused in the US Government or DoD?

I'm US military and I cannot think of a single thing that has happened over the course of my very long career where I could point to it and say "this would be better without diversity or inclusion". Even in the cases where I lost out on a promotion or new role to someone who would be considered DEI, they were better suited for the job than me and are currently crushing it. Why do I keep seeing comments saying "it's about time the insanity ended"?