I want to say something about characters being pathetic, as in such a way to refuse the belief that such people exist outside of fiction.
Than I remember, fiction mimics real life. And modern real life has been pretty keen on driving home how despicable the powerful often are...
Personal rant below, useless on the void of the internet.
Eli's behavior matches well to a cousin of mine that was in a similar situation. Cousin's Mom used her to vicariously live her dream of being in beauty pageants ever since my cousin was old enough to stop needing diapers. Meanwhile same hellbitch abused the shit out of her two sons... My cousin fits the same personally as Eli still, even in her 30s...