As a child what killed the “Battle of the Bulge” was the fact both sides used M-48 Patton's instead of Shermans and Tigers. Even at that young age we all knew what a Tiger looked like.
Even movies like Gladiator were quite good in the initial battle scenes. I even used the first sequence in class as an example of how the later Roman Army fought. They were the U.S. Army of their day.
It always come down to a matter of degree. When a movie tries to encourage an agenda it needs to be pointed out.
What killed the “Battle of the Bulge” movie for me was the effort to make the battle hinge around a fuel dump - a gasoline fuel dump! German tanks used diesel! I knew that even as a kid. Also as I remember the movie it gave little mention of Bastogne.