Jasmine was a self-creation. Many such creatures can hold it together. Some can't and trigger their own brutal downward trajectory. Masterfully, in "Blue Jasmine" provides an update of "A Streetcar Named Desire," complete with the blue-collar types and the descent into madness.
Unfortunately, the main character Jasmine, who knows her husband is a con, ruins other lives. She invites her struggling sister and her working-class husband to invest in her spouse's Madoff-like con. When she calls the FBI to turn him in, his and his son's lives are over. The husband commits suicide in prison. The son flees Harvard, turns to drugs, and only finds redemption in a marginal job.
The ironic part of the layers of con is that husband, it turns out, needs a real lover. He is dumping Jasmine for a young babysitter. That shatters Jasmine, who isn't too well put together emotionally to begin with. When he literally walks out, she gets on the phone with the FBI. One wonders if this dumping of seeming pretense for the real thing is, for Allen, autobiographical. His enraged Mia Farrow also takes the matter to the authorities, only it's the court which determines sexual abuse.
The film has many messages. Among them is: Watch out for pretenders. Their posings bring down more than themselves.