>>85751786>WASN'T ALL THAT BAD
Dude, Rusty was forced to commit murder when he was 12.
Rusty was kidnapped repeatedly by both supervillains and laymen.
Rusty must've had a serious medical condition and been in extraordinary pain that went untreated for a substantial period of time during one such kidnapping hence "Rusty's Law".
Rusty's father showed no regard for his health (ie. Rusty's tinnitus, Rusty being strangled, Rusty being used to test the safety of theme park tides).
Rusty's father denied him outside psychiatric help to gaslight him into feeling guilty for not being happy with his neglect/abuse.
Rusty was publicly humiliated (ex. 16th birthday) by his parental figures.
Rusty was exposed to sexuality inappropriate for a child (ex. literal prostitutes at his 16th brithday party).
It's implied Rusty was forced into his career ("I'm not even sure if I want to be a super scientist", creative writing class in university).
It's established that Jonas didn't take Rusty to a proper medical doctor when he was sick.
Rusty's childhood was horrific. Even in the scene you post Rusty acknowledges that while Jonas was a horrendous father, he was a good scientist.
Most people from abusive childhoods can't fully hate their abusers.
Bojack's childhood wasn't in the same league.