Complex sentence: Susan is disappointed and angry at Greg, who viewed Maddox as an antisocial nerd instead of a good role model as Susan believed, and as she is going back to college full-time, makes a chore bag where Greg and Rodrick pick chores to do.
Split into simpler sentences: Susan is disappointed and angry as Greg, who for viewed Maddox as an antisocial nerd instead of a good role model as Susan believed. Susan, now going back to college full-time, has a chore bag where Greg and Rodrick pick chores to do.