How is Mirabell responsible for the complexity of the play?

Mirabell's character that adds to the complexity of the play. While likeable, Mirabell is also ruthless in his exploitation of both servants and peers to get his own way. But since nearly everyone benefits from his schemes, no one seems to mind, except Fainall and Marwood, whom he exposes at the end as perfidious and maladroit traitors. Mirabell is a proud, artful, and generous man of the world who knows he is suffering from a love sickness from which he cannot and does not want to escape.