Honestly, I don’t think there was any kind of good justice he could’ve faced because he didn’t break the law with her meaning it’s not like they could have had him arrested or pressed charges for it (though he definitely should have gotten his ass thrown in jail for giving her friend booze). It’s a shitty situation where the best that could happen is that he gets publicly outed and shamed, but it comes at the cost of her story also getting spread. If that’s something she wanted, then that’s fine. But since it was all rapidly happening without her consent, that’s awful. I can’t even begin to imagine having reporters show up at both my workplace and my home to dig into a past trauma so callously. At the very least, she should have had control over whether or not people got to know about it.
I kept hoping, during the episode where Bojack tells them about every bad thing he did, that when he spoke about Penny that Diane would have at least a brief moment of “oh shit…” but it just never happened.