This film is obviously divisive.
There are those who complain it didn't show the scenery, or had bad acting, or unlikeable lead. It's unfortunate none of those things is what the film was about. It could have focused on the scenery, showing every beautiful vista or building along the way. It could have used all actors rather than some actual pilgrims and real people along the way. It could have had a very likeable person as lead. And the movie would have failed its objective.
The reason the movie has an unlikeable lead is because that's who he was - a self-absorbed, arrogant, difficult person (did you miss one of the last scenes with him on the phone to his wife?).
The story focused almost exclusively on his character, and how he 'grew'. And I believe it did a pretty good job of that, even down to him questioning if he was ready to complete the journey when he was within spitting distance of the end.
He basically had an epiphany towards the end - thus meeting the objective of growth.
There were some parts that could have been done better. But overall a good movie.