The heart of the director and of the main actor are just not there, and it shows. Even the battle scenes feel boring, predictable, and not spectacular at all. It is almost inevitable to compare this to 'Gladiator', because the latter excels at all the points that 'Robin Hood' fails at.
It is a failed epic, devoid of passion, adventure, or feeling. I was surprised at how boring this movie turned out to be. So Ridley Scott tried to take a new approach on a well-known story, but the results are not impressive. It is by all practical means a 'prequel' to the classic legend of Robin Hood. It presents all the known characters, though many of them are vastly underused, and it describes how they came to know each other and become involved in each other's lives. This is rather the (embellished) narration of how Robin Longstride came to be Robin Hood. As it has repeatedly been pointed out, you should not go into this expecting to find one more version of the 'prince of thieves' theme. Technically and aesthetically accomplished, but empty of substance, and full of pretentiousness, this 'Robin Hood' is, in my opinion, one absolutely unnecessary revision of the mythical English archer's story.