The most persisted complaint against the film is that it is not critical, but glamourises these people and their behaviour. Yet the film opens with the people at Stratton Oakmont's office throwing a dwarf and then there is a freeze frame just as the head of the dwarf is about to hit the target. Is that not enough to make the point that this is a film about characters that are appalling in all ways? The film does not leave it at that though, there are several such scenes (a female employee's head is shaved in one scene, and she is clearly most uncomfortable with it) leading up to the end where there is a scene in which Belfort almost kills his daughter. Why would Scorsese have such scenes in the film if it was not to condemn these people and their behaviour? It seems to me to be clear that Scorsese wanted to show how it was possible for Belfort to get away with what he did; to show his shallow charm and persuasiveness while at the same time showing how he was a person who ruined everybody he came into contact with, including himself.
"Stratton Oakmont is America" Belfort says in one pep talk, and the film seems to be saying that yes, America is like Stratton Oakmont and that is a very bad thing. The film, much like Pain and Gain (Michael Bay 2013), is about the "American Dream" where the dream is presented as a shortcut to an abyss. But it is not just the stock brokers, the guys at Stratton Oakmont would not have succeed if ordinary people had not been so pathetically eager to beat the odds and get rich(er) fast. And it is not only an American thing of course, it is universal. In the last image of the film we see the awed faces of ordinary kiwis (the scene is set in Auckland, New Zealand) trying to learn from Belfort how to get rich quickly. We have met the enemy and he is us, as Pogo said.
A number of other Swedish bloggers has also written about the film. Here are links. The first blog is in English, the others in Swedish: The Velvet Café, Fripps, Rörliga bilder och ord, Jojjenito, Fiffi, Har du inte sett den, Movies-Noir, Except Fear, Filmparadiset.