Holmes is a military historian and as such, not immune to jingoistic lionisation of British military exploits throughout history.
If you accept that this series is not supposed to be "balanced", then it is as others have pointed out an excellent addition your collection of Revolutionary War documentaries. Compare with the superb PBS 6 part series "Liberty!". It is just nice to see the conflict from the perspective of a British historian.
American's may not be aware that many Brits find it obnoxious to have the outcome of a relatively meaningless war lauded over them, and the vietcong references are illustrative of this sentiment.
I've noticed that many Americans view any critical interpretations of their history as "anti-American", this is regrettable but a modern spectator must not ignore the vices and only focus on the virtues of what they believe to be their forefathers exploits. Soldiers were not angels, neither were the founders who are deified by many Americans. The British Empire also perpetrated great evils on countless millions living at that time, and the liberty fought for by Americans clearly did not extend to everyone.
I know its not nice to be reminded of that, but the point is that history is not a simple story of heroes and villains as portrayed by the sanitised and fanciful garbage like The Patriot.
