Jules is a deeply infuriating character. Her consistent self victimization and self putting would be more grating from a less talented writer. Tanner is able to show rather than tell the complex relationship between an older and younger sister. She especially captures the undercurrent of jealousy that tinges the cruelty that Jules treats Poppy with. 

I can't help but hope for the best for these two characters. They're trying to break the cycles they been stuck in and there is some hope by the end that they just might.