This would be bad enough were it not for the fact that dimwitted Elly blamed Lizzie for her own ineptitude. It wasn't that an irresponsible dullard made a very bad decision because she didn't know what she was doing or where she was. It was that Lizzie ran away from Mommy to scare her and embarrass her and make all the other grown-ups think that Mommy was a reckless imbecile who was too lazy and dumb and messed-up to leave her child with a sitter like a person with a functioning fricking brain.
Worse still, Elly also doesn't do anything unfair and cruel like learn from her mistakes because she's too blasted stupid to realize and remember what mistakes she's made. As we know, this damned near killed April stone dead. As it was at the airport, Elly was too damned busy running her mouth and avoiding doing the thing evil, conflict-causing, chaos-loving, fulfillment-devouring strangers who clearly don't want her to have any time to herself ever because they hate her call "paying attention to what's going on around her." As it was at the airport, a small child got herself into trouble because she was unsupervised and thought as a four-year old. Also, the child is totally to blame because her mother is an imbecile who thinks that foreseeing disaster is futile and also a means of depriving her of her freedom.