Check out the History Channel's schedule today. Not a cherry-picked day, just a normal schedule for them: https://www.history.com/schedule

That's four hours of aliens nonsense, four hours of drug themed history documentaries (probably the same target demographic as the aliens stuff.) An hour of christian prophesy and preaching, 12 hours of reality TV, and some infomercials to make up the difference.

Is it any wonder that an ostensibly serious man such as a military commander thinks that the History Channel is trash? I'd be concerned if he didn't.