You can, but for a better representation, imagine one shoots the other but, as a lesser man to begin with, ends up miserable despite his fame. Between living his life in a man's shadow, and living his life in a dead man's shadow, the former was preferable. Also, imagine Heath Ledger as Brad Pitt.

I didn't find the movie boring, but I will agree that it's not fast-paced by any stretch. There are a few scenes of violence that I found a little excessive. I did really enjoy the film, though, and thought that Casey Affleck's performance was well worth watching.