Vindman was more a creature of the intel deep state than a “military man”. He is not indicative of the “military” and frankly a LTC in DC is rather unremarkable within the Pentagon.
A lot of this “military resistance” stuff you are reading about is a creation of the mainstream media and swamp.
Vindman will enjoy a high paying job with some swamp think tank or a Soros organization. The impeachment was a farce, but there does not even need to be a thread of truth for the left to run with something in the era of Trump.
Vindaman was a Russian at heart. He was born in Ukraine and grew up in Little Odessa, NYC. At best he had split loyalty. I don’t doubt he kept the other side informed about issues affecting them and tried to influence action in favor of the old country. Now he can work as a Ukrainian or Russian lobbyist.