I'm with you on this one. It seems like they're trying to spin his military record to fit a certain narrative, but it's just not necessary. The guy volunteered, served, and retired with honors - that's something to be proud of! By embellishing his record, they're opening themselves up to criticism and accusations of dishonesty.
You're right, he did serve as a Command Sergeant Major, and he chose to retire as a Master Sergeant due to the benefits. That's a legitimate choice, and it doesn't take away from his service. Why not just own the truth and avoid giving the opposition ammunition? It's frustrating when politicians feel the need to manipulate the facts instead of just being honest with the public.