yeah this is supposed to be Year One Batman so he is still new.I thought that was the point of this movie, that it's sort of a "Year One" story with Bruce still sorting out exactly how to be The Batman. Am I wrong?
I definitely think this Batman might be the most armored of the Batmans given that we see in two separate scenes Battinson no sell bullets from handguns and machine guns at a pretty close range. They are shooting his chest/body most likely but the bullets seem to bounce off.
Batman is definitely like a Terminator in this movie, seeking vengeance and not giving a damn about anything else.