Curtis is used to having a mission, some goal in the distance, something he can move toward, but in Darrow, he doesn't have that. Playing him as directionless really highlights how lost he is, how little he knows about himself, how he's never really been able to live a life with any sort of choice or focus on what he wants. He hates himself, so he has very little motivation to find his place in the world. Which is tough, because he's such a driven person.