Right honestly, as teenage girls go it's pretty common to jump from interest to interest (I'm a few months younger than she is) so I'm not going to berate her for not really having a solidified personality - it's often easier to bump around aesthetically, particularly when you're in the public eye or trying to appeal to a certain demographic.
But I just don't understand why she won't let Mabel do things because they don't fit into her aesthetic choices. Kids clothes, toys and TV shows are all goddamn ugly! Who the hell likes every single primary colour coated on everything? Not me! But given she was someone who wanted to study Childcare, you'd think she'd know that there are developmental benefits to most things marketed to babies and children! When I have kids, I'm gonna make sure everything is bright and ugly and fairly reminiscent of an exploded clown factory. I just can't stand people who put their aesthetic needs over their children's developmental needs - it's very in lieu of Acacia Kersey.