I'm just reminded of all the little B-plots where Peggy is jealous of Bobby. When she writes that essay that he gets credit for and she's losing her shit, not because he cheated on his school work, but because she wants the validation. When he upgrades her "propane maniacs" idea to the much catchier "propaniacs." When he starts learning how to cook and Hank finds out he likes Bobby's cooking better. When Bobby has his first breakup and she rubs in how her relationship is rock solid after decades but his only lasted a few weeks.

There are so many examples of her just being a shitty person to her own family in the later seasons. It really made me hate her as a character.