Yeah… what I can guess here, that before timmy was born his parents was said that they we're going to have a daughter, & Timmy's Dad made a bet with Dinkileburg for Dinkleburg's fortune that he got at college, & when it came out a boy, well… that was kind of the reason why Timmy had a Crappy life, & on the outside his parents looked like morons, but on the inside they're still mad at him for being a boy, & that's why they don't notice Vicky acting like a asshole to Timmy…

Makes Sense Doesn't it?

FoP got arguably the worst, at least the rest are consistent, FoP went from “Handle life with the help of fairies” to “Escape from life and build a new family with fairies”.
It can’t get any darker than it already is.