I partly agree. I didn't find myself liking the author either.
But I liked the dog
I thought that the things that Marley did were not "worst dog in the world" stuff, but pretty typical (except the storm anxiety part).
I was mad they went on vacation too. However I do know that MOST people don't feel about animals they way we do here on pets.ca, and that the author probably represents most people's attitudes to their pets. He was a pretty ineffectual owner/guardian/daddy to Marley IMO...