He didn't say he was a "combat veteran," he said he served during and supported a war, which is true. I did the same thing through a couple of wars and a number of skirmishes. I even carried a rifle a few times.
He was wearing CSM stripes at his retirement ceremony. He was actually reverted to his permanent rank after his retirement. I have a quibble about how he's characterized that sequence, but it's not worth all these histrionics. It's really not.
That's not a fact, that's horse manure. Sure, a Guard combat unit can expect to deploy eventually if there's a war going on somewhere long enough, but when? In the meantime, people live their lives. He was middle aged with a wife and kids who certainly didn't want him to deploy again. He put in his retirement papers months before his unit got deployment orders, and it was months after that before they actually departed. There's nothing at all wrong about that, not even a hint of wrong. It didn't raise any eyebrows. People do that all the time. He didn't "abandon" anyone...his replacement was already in place in the unit and always had been there. They didn't even have to train a "new guy." He had been replaced before he left. His commander shook his hand, everyone gave him a round of applause and someone sang the National Anthem.