I was in the military. We kept each other's back whether we liked them or not. This is one reason the military is, usually, such a bonding lifelong experience. The violation of core trust (in the movie) upset me more than I could ever imagine.

Of course, I live in a bubble. These things and types of people (and organizations) exist and live their lives with no remorse. It is good that this movie brings this most unpleasant fact to life.

This is storytelling at its best.

The only consolation, for me, is that it his heartless actions cost him the life long respect and bond of his child.