Clearly, Fistful of Dollars is the Worst of the Trilogy
For a Few Dollars More was pretty good...
The Good, the Bad, and the Ugly was a near masterpiece...
But the first of the trilogy, Fistful of Dollars was pathetic.
Especially as compared to Yojimbo, the movie its based on. There's just no comparison. Leone brings nothing new to the story, except setting it in the west. The sequels are far superior.