I've watched this. Thought it would be a setup like the Duggars, but it's much sadder I think. Kim accidentally running over and killing her young child - what more evidence do you need that there were too many children in this family?
Kim & Barry are both awful though. Denying their children so many opportunities in life - those poor "little girls" are given some rudimentary ballet teaching by Kim, yet when she was young, she went to real ballet classes.
Poor Lydia - she's very devout, offering everything up to god and thinking he's got some great plan for her. I don't think she'll ever break away until she realises that's all bollocks.
Ethan & Olivia - he loves her, but he just doesn't understand her at all, thanks to zero preparation for real life by his parents. The episode where he described when he first masturbated and ejaculated age 13 - he had no idea what was happening 
Micah - what a handsome young man. I hope he's successful in his modelling career, but what then? No skills or qualifications.
Moriah - I like her a lot, and she's so much happier now she's moved in with Micah.
The stand-off on the driveway - I wanted Ethan to smash Barry in the face, he deserves it!
Custard pies - such a weirdly staged scene. The kids had no idea what was going on, they were nervously glancing around to check what they were supposed to do - join in, laugh, or what?