This is the kind of movie that should never leave America, lest it be used as a terrorist training video to incite ire against the wretchedness of Americans.

Bob Munro (Robin Williams) is a good guy and a hard worker. His hard work as a talented executive has landed his family in the top echelons of middle-upper-class citizenry. But when his daughter’s friend assaults his boss, Williams does damage control, forced to cancel their immediate Hawaii vacation and instead, traveling to Colorado to salvage his job at an important merger meeting. Aiming to keep that last part hush-hush so as not to upset his family, so he rents an RV and plays the trip off like a chance to bond.

But the family kills the movie. As horrible as they are privileged, they are nothing but awful to each other, all the way through. It’s easy to see where they got it from.

Mom is Cheryl Hines, reprising the one-dimension of spoiled, emasculating shrew she showcases on HBO’s ‘Curb Your Enthusiasm.” She makes it clear at the start of the trip that she neither wants to cook a single meal nor spend a single second with her children. The kids, following her lead, are unknown Joanna Levesque, who plays, essentially, Lindsay Lohan on the first two nerve-wracking days of a fast and unknown Josh Hutcherson, who can only be recalled by his consumer accoutremonts - “weights, baggy shirt, MP3 player” and equally foul attitude.

“Great news,” Williams says at one point. His daughter snaps back with Norma Desmond-scale bitterness, “I’m adopted?” When Williams rents the RV, she scowls and screams, “Mom, some idiot just parked this ugly RV outside our house! Omigawd, it’s your husband!” When they finally get on the RV, she huffs “This is the worst I’ve ever been treated.” Her mom responds “Wait till you get married.”

Nothing but raw vitriol is hurled at the man who raised them and bought them their cool existance. They can’t be talking about Williams. No way. Uh uh. You couldn’t pick a better fictional dad. Their one factual gripe with him? His work enabled him to buy himself a $4,000 bike. Of course, it also bought them their posh house, his son’s camping trip to Alaska, his daughter’s expected college years at Stanford and his wife’s absolute freedom to gaze at her unhappy reflection all day in her polished granite countertops if she so wishes.

Robin Williams is one of the funniest men on the planet. The only way it would have been acceptable for this fictional familiy to suck the marrow out of his funny bone like they do in this movie would be for him to extract revenge on them at the end, like Cinderella getting a chainsaw and going to work on her ugly stepsisters. Sadly, there is no such release from this deep hurting.

There’s a scene where, trying to empty the RV’s septic system, Robin Williams ends up cowering under a rain of liquified feces as tourists in lawn chairs and sunglasses clap from the sidelines. There’s a chance you’ll identify with the giggling porkers snorting at Williams’ predicament. But more than likely, you’ll feel like Williams.

Ashley O’Dell writes about movies that aren’t in theaters anymore.