Relentlessly stupid cartoon about an unlikeable family of cavemen who behave and move like animals but argue semantics, who don't know what fire is but know what burning is and who break laws of physics at will but can't walk in shoes. The only likeable character with a decent, useful human attribute is consistently ridiculed for it until everything halts in a mire of 'Dad issues', how it's important to 'find yourself' and how having a pet makes everything OK.
I asked Charlotte what she thought the film was about and got "Everybody follows the rules, then everybody breaks the rules. Breaking rules makes things better.", yeah thanks a fucking bunch Dreamworks, you cunts.