Zen and the Art of Auto Mechanics
May have been a better title. It is certainly more descriptive of of what was shown.
It has been too long since I read Zen and the Art of Motorcycle Mechanics to offer any insight as to the similarities if any.
It is certainly suggested the protagonist reached the state of nirvana.
The Title and ending graphics as well as the occupation of the central and several other characters intimate vocation.
I was somewhat bewildered by the ending until the alternate title popped into my head. "Some things one must just accept" is heavily inferred.
One Way to Valhalla suggests the opposite direction to ultimate release. Valhalla, we know is about war and warriors must die in battle to enter. This to me suggests a War hero story, and may be why the movie is not rating well. People pick up this movie expecting the opposite of what they get.
Too many people use credit to buy things they don't want, to impress people they don't like.