smart and intelligent are two diferent things. Are you aware that he had sexual fantasies about his mother????? His psychological analysis is somewhat updated from what psychologists today think. He's the one that came up with the Oeudipus complex. He says that each child is attracted, sexually, to the parent of the opposite sex, which is his explanation why girls prefer their dads and boys their moms. To me he doesn't sound like a smart man, but intelligent nontheless to be so famous with the publishing of his ideas. However, I think his unusual behaviour is what made his ideas heard.
Just because a book uses big words and looks hard to read it doesn't mean the contents presented is right. Especially with dreams. And especially coming from Sigmund Freud for that matter lol