Gandalfs Beard wrote:
I didn't like Denethor in the books, so I thought the film actually portrayed him as I read him.
I don't think you're supposed to like the guy.

Or was that not how you meant it?

Seriously though, I think the films did a bad job showing Denethor. To borrow from an earlier discussion of the matter:
Denethor’s character was drastically simplified into a one-dimensional lunatic. Tolkien stated in Unfinished Tales, “The Palantíri” that:
Quote:
“Denethor was a man of great strength of will, and maintained the integrity of his personality until the final blow of the (apparently) mortal wound of his only surviving son. He was proud, but this was by no means merely personal: he loved Gondor and its people, and deemed himself appointed by destiny to lead them in this desperate time.”
The truth of this is evident in The Return of the King, in which Denethor is no fool. He did summon the armies and call for aid from Rohan, and sent Faramir only to reinforce Osgiliath, not retake it. True, book-Denethor was irrational at the end, but film-Denethor was irrational from the beginning: blindly foolish, refusing to summon the armies of Gondor or light the beacons; and sending his son on a suicide mission to retake Osgiliath.