Butchered Chandler's novel
I know Altman fans would argue that Altman has to make all of his projects Altman films but he simply butchered Chandler's novel.
It was not too hard to transfer the 1950 setting into a contemporary 1970 story so that was not Altman's limitation. First the most laughable crime Altman did to Chandler's novel is Marlowe killing Terry Lennox (and when did Terry and Marlowe become the best of friends in the novel they just met each other). In film adaptations you can understand and justly a director and/or screenwriter has to cut certain chunks of novels because no one wants to the filming of a novel but an adaptation of it. But Altman deletes a dozen character, eliminates huge plot points, murders the ending, the characters lost who they were.
Getting past Altman murdering Chandler's novel I did like Eliot Gould as Philip Marlowe he was a nice change of pace from Bogey's Marlowe. Nice change of pace but not better.