All the flashback episodes were pretty fucked up, even with all the gags they put in, it just hurt to watch since you know what is coming, but you don't want to see it. But they will show you. Bojack's mother made some shitty decisions, but she was mostly scared to death by what happened to her mother it seems. The political commentary was kind of obvious, thank god they gave it a happy ending, since the show is about characters, not "the system". Bojack's role as the nexus of depression and bad decisions has been downgraded somewhat, which is a welcome change, with most depressing decisions offloaded to Princess Carolyn, Mr. PB and Holyhock. Booty academy is an idea worthy of an emmy, especially with sir Mixalot on the panel.
"Stupid piece of shit" is probably the standout episode for me.