Like you know it all (2009)

His name is spectator. He often escapes from important moments. He leaves drunken co-workers alone with guy and lets her be raped by the guy. Because He was drunken too.
Also He is polite. He had a affair with his friend's wife when they thought her husband was dead. But he was not dead and knew about the affair and blackmailed him. Our main character talked to his other co-worker that he needs to talk his friend because he misunderstood the affair. How perfectly polite he is.
His politeness makes audience uncomfortable. HE thinks himself as well-balanced in the world, but he eventually ruined many relationship he involved because He is spectator and acts like he know it all.