Augustine describes his encounters and life of sin in his early life as attributable to his own lost state and the foolishness of his own sinful heart. He doesn't really blame any particular set of circumstances, though he does mention that his father cared little for anything aside from for his education, and the hope that he would become an important and well known orator. He mentions that his mother did try to be a good influence on him, but he dismissed her invitations to Christ as her simply being a foolish woman.
Augustine came to be bonded into several sins, the primary sin that held him seemed to be sexual sin; the sin of fornication. He also practiced thievery with his friends, once stealing fruit from a tree, and then essentially discarding it as he simply stole for the thrill and debased pleasure of stealing. Augustine of course eventually breaks free by turning to Jesus Christ for salvation, and repenting of his sins. With the power of Christ at work within him, he found new power to resist sin and live holy and pure. He is overjoyed which shows in his writings to have found freedom from sin and the incredible love of Jesus.
You could possibly consider Augustine's perspective on sin as a net
positive in the fact that it drives the sinner to conviction, regret,
shame, and emptiness. With the increasing realizations that sin provides
no lasting fulfillment, the sinner increasingly becomes open to the
love of Jesus that offers freedom from the shackles of sin. Sin leads
the sinner to Christ, one might say.
