It’s kind of by design imo

BoJack is the “protagonist” of the story. He is the main attraction of the show. And at that point of the story, it felt like we just got past the climax and into the falling action where we see the results of all the struggle we’ve watched through each season. A happily ever after of sorts.

But then Paige Sinclair turns up in comedic over the top fashion and threatens (and later succeeds) to destroy that “happy” end.

But as we all know, BoJack really did hurt others without external consequence. Morally, it wouldn’t be right for him to just walk away like that