Honestly, while the girl obviously has a mountain of shit she needs to confront and deal with (she's also self-aware of it as well). My takeaway from this mini-arc has been how terrible the teacher is and how poorly he's addressed and handled this. Being perfectly aware of all of this, purposefully taking a dump in the drama pool, then peacing out. How have all the adults in this mini arc, that should have been present, mentoring, and helping the kids, just completely dropped the ball. People, especially kids, don't magically get their shit together without guidance.