If I was looking for an honest and truthful documentary about Vietnam, Burns is the LAST person I would go to.
Jane Fonda? Tom Hayden? Bill Ayers? Michael Moore?
You know you aren't going to get a conservative view from Ken Burns, but besides airing critical views of the US and South Vietnamese government and military, he also included criticism of the North Vietnamese government and military, the Viet Cong, and the American anti-war movement.
I only saw part of the series, and can't judge on the details, but it seems like people complaining that it didn't represent the pro-war view of the 60s may miss that it also doesn't reflect the simplified anti-war views of the 60s either. If somebody is expecting a program that just repackages the certainties people had back then, any decent documentary would be a disappointment.
I get it. Ken Burns has his own point of view. He has a bias. But the show could have been a lot worse than it was.