as to how WW2 is depicted, how would you expect, those films were not made yesterday but a few years after the war ended, the knowledge of experience, and historical facts would likely make these films somewhat differently. Also you don't make films during war time, nor somewhat after showing the true reality of warfare, because that would be a demoralising fact for the forces fighting, and for the families back home, having to endure privation, hardships, and endless bombing.
The young men sent off to war in WW1 had no idea what they would be facing, nor seemingly did many of the Generals, they still thought that they were on the fields of Eton, a short time into the war they all knew different.
Gove is not a bad man, i actually think he is right on many issues.