I totally agree about the demythologising of Troy. Most of the movie was pretty good, not great. The thing that really bugged me was that the gods were not talked about. I don't need the gods to be played by actors, but this was a society where everything was correlated to their gods. It would be like making a movie about Jedis and never talking about the force. One guy in Troy talked about the gods being angry at the Greeks for destroying Apollo's Temple and he seems to be treated like he's a religious nut. If I were one of the Greeks, I would be pissed at Achilles for angering Apollo. Apollo is not a god that you would want against you.
My other main problem was that the Trojan War took ten years while the span of the movie was about two weeks. Also, the love story didn't work. Other than than that, it wasn't a bad movie.