What I found odd is that there is apparently only one film made of his story - 1993's French Pétain - which must have been so good it didn't even warrant a wiki article in english and the only IMDB review is titled "A well costumed production".
Kid who grew up listening to older relatives talking about serving under Napoleon grows up to be war hero only to then become a traitor, survives the trial only to die senile, directing imaginary armies in his head - That's full of potential for one of those Oscar-bait films that come out in the Autumn.
And responding to OP, my opinion is that his role in establishing/legitimizing the Vichy regime and all of its crimes make him a full-on traitor and criminal, to France and to the Human Race. Doesn't mean I don't credit him with his victories or even that I do not recognize he was a man of great courage - surrendering twice, both to Germany and to the Allies, was certainly brave - but he applied it at the wrong times in the wrong ways and for all the wrong ideals.
