Hot Take: Doctor Champ is the worst side character, the only reason he isnt seen as just as bad as the main characters is due to limited screentime
I recently finished my first ever rewatch of Bojack, drilled through it in like a week and a half. My first watch I found Doctor Champ to be a somewhat unremarkable, secondary, neutral character. Sure he played a role in season 6 part one but I kind of just brushed him off.
Upon rewatch though? Doctor Champ is an asshole. He takes zero accountability for himself and actively takes steps against himself and blames Bojack. Bojack's only crime was bringing alcohol to rehab, which ok fair very poor choice, but come on, you're telling me Doctor Champ took a swig of the alcohol, and then decided to chug it like he was fucking parched for water and not once realizing it was alcohol?
And then he made the conscious choice of getting drunk himself at the bar the next day, and Bojack comes to help him. And somehow its Bojack's fault? He did the right thing, he took a man who very clearly is not actually fully sober to rehab and Doctor Champ "wants him to remember what he did to him", bro you chugged the alcohol? And he checked you into rehab to get you help?
And then he procedes to reveal the stuff Bojack told him in confidence in rehab? All to take down the guy who "caused you to relapse" when realistically it was 100% his own fault? I dont care that hes not actually a therapist, firstly he presents himself as a therapist to all the people in rehab, and even at that, thats a super messed up thing to just blurt out about the guy who actively changed under your watch at rehab.
I feel like that sequence of events is just as bad as some of the stuff people hold alot of the main characters accountable for. The only reason hes not seen as just as bad as them is because hes only in a handful of episodes, and by that point the show has made you hate Bojack so much that you cant see that Bojack is not only not at fault in that situation, he is actively doing the right thing