Man, they hardly ever give any insight into their childhoods, but every once in awhile youll get a few lines here and there and man, with just those few lines they give you can learn so much about a character. The superb acting also helps.
Connor's whole speech at the karaoke bar said so much. This guy has clearly never received any type of love growing up. Logan is as cold as can be, and we now know that Logan was responsible for having Connor's mother sent to a mental hospital. Connor has always felt the odd man out with the other siblings. The man just wants someone to love him and appreciate him as hes never received that throughout his life (probably a reason why he wanted to run for president and is so bent on maintaining that "1%"). And due to this, its made him create a hard exterior that pretends hes okay with the fact that he is not loved by anyone. What a sad scene, but it really gave you a completely new look into Connor's character.
Really seems like Kendall doesnt give af anymore and just wants to watch the world burn. Who knows what his end game is, and if he really just wants to f*** over his dad to prove to him that hes a killer and had what it takes to do the top job.
Roman will never be able to fully disconnect from Logan. He is living definition of Logan kicking the dog that he loves just to see if it will come back. Roman will always come back to Logan no matter what he does, and will always find a way to brush over the abuse that he receives (even in this episode he mentions being hit as a kid and he agrees that it was fine because he was annoying).