Bojack fucks up, blames it on others, then expects them to help clean up his own mess. He's a manchild that refuses to take responsibility for his actions.
>But Diane is his friend, friends don't abandon friends!
You mean like Bojack backstabbed Herb and threw his hairdresser under the bus? Friends also don't tell friends "I'm killing myself and it's your fault if I'm successful because you aren't holding my hand 24/7 and coddling me like a misbehaving toddler."
Nobody is responsible for Bojack except Bojack. Not his mom, not Diane, not PC. Just Bojack.