Suzanne's Career

Neither the narrator, Bertrand, nor Guillaume, his "best friend", are likable, or sympathetic. Guillaume apparently ensnares the submissive Suzanne who becomes the object of pity and contempt for Bertrand. What does Suzanne see in these two boys? Are they using her, or she, them? It seems Suzanne's "career" is sexual. Perhaps she has learned to work the system, or does the system win in the end?