Terry Pratchett's short story Troll Bridge is a tale of a barbarian named Cohen who meets a troll under a bridge and befriends him. Throughout the tale, Mica the troll tells Cohen all about his financial issues and the stereotypes of trolls under bridges. There is an underlying tone of dissatisfaction when Mica talks about his occupation. 

Since this is a short story, the tale isn't complete and is left open-ended. It looks into the first part of the hero's journey, reflecting his call to adventure and crossing the first threshold. There isn't this huge bloody battle with a dragon, it is just a man listening to a troll's tale of his life, choosing to help him financially and spiritually as he bestows the troll with advice.