This is a way for people to profit off their extended vacation. It has no real content, and is a story of two people who search for happiness, ask no one on their journey about what happiness means to them. Good music though, I’ll give them that.
(Spoilers ahead)
The movie doesn’t really resolve anything internally or externally. They build a big environmental catastrophe of a bus, drive it around, and make their dog miserable in hot weather. Just shave your dog! Why would no one shave a mountain dog in hot weather?
They say they are unhappy home, so they travel, and they are unhappy traveling and want to go home. Sounds like they need therapy, not a vacation. I wish I could have that time of my life back.