Anton Chigurh failed his primary mission.

In the movie No Country For Old Men, Anton fails his primary mission. His primary mission is to return the stolen money to its rightful owner, but he never gets to Moss in time and the money is retrieved by The Cartel. Meaning Anton failed.

Although the movie makes his success or failure ambiguous, it is my belief he failed.

In the book, it's clearly different. He wins and returns the stolen money to its rightful owner, and got a promotion.

Just more Hollowood fluff. It's why I call it "hollow;" I grew up in Brentwood, next door, and several of my immediate neighbors were Hollowood folk. I liked them, personally, but their profession, I thought even then, and their presumption of political savvy, was completely jaded. Still do. You're better off sticking with the book. The author wrote thee book; Hollowood merely interprets, and, usually, poorly. On rare occasion, they get it right, even departing from a book as origin of a story..

Been a while since I've seen the movie,

If he did fail, what makes this of interest to you?