If anything I think Bojack Horseman had the opposite problem of Helluva Boss. (Which is also funny, since the acronyms are reversed, BH and HB.)
Bojack's writers were concerned that people were sympathizing a little TOO much with the characters, and you, silly viewer, weren't supposed to do that. You were supposed to ignore the characters redeeming qualities (except Diane, who was always right, especially when she was wrong). You were supposed to cheer when they were finally punished for their misbehavior. It got to the point where in-character descriptions of past events lied about facts to make them sound worse than what actually happened.
For example, Pete Repeat telling Hollyhock about the night Bojack got drunk with a bunch of kids at prom. Pete claimed that he forced them to drink alcohol, which was a complete lie, they had brought their own and Bojack went along with it. What he actually DID was bad enough. One of the girls drank so much she ended up in the ER, and Bojack swore everyone to secrecy to protect him image. But the show just could never resist saying "NEVER FORGET THAT THIS A BAD PERSON, STOP SYMPATHIZING WITH THEM, THEY DESERVE PUNISHMENT", even if they had to make shit up. Even if the punishment was for something they didn't actually do, you were supposed to support it because that's karma.