It's propaganda but it's also true facts:

1. The US military has 10 year-old doctrines to deal with 20 year-old wars with 40 year-old tech that was developed for a completely different kind of war. They're going to be the French at the start of WW1 trying to replay 1870.

2. Look at the average American

3. Power projection being the focus of the military has resulted in a force that's overworked, complex technology that's undermaintained, and way too much investment in legacy systems that won't apply to a war with China or Iran.

If the US ever goes to war with either of those two countries or one like Russia that can endlessly absorb attrition, it's so immediately fucked. Only air superiority and the untested defenses of a carrier group separate it from collapsing into mutiny like it did in Vietnam.