However the reason a lot of these cunts get away with their deplorable actions is that a lot of people (male and female) simply don't want to go to the hassle of actually reporting the crime.

The same thing happened to my girlfriend with one of the higher-ups of the company. I recommended going to the HR but she didn't want to do that, instead she talked about it with her female coworkers who -surprise surprise- had very similar experiences.

She came to the same conclusion as her coworkers had, the company would suffer without the "great leadership" of this guy and getting him fired would be "very unfair because he has worked here all his life". They decided that they "needed to do what's best for the company" by just being silent. She decided to let it go and to find a new job. I tried to say that there will be new victims if she doesn't do anything but I couldn't get her to change her mind.

The key is to make it clear that it is 100% her decision to report him, and that you will respect her decision no matter what she decides. Anything else is simply another form of bullying and will simply drive a wedge between you.

This is the most important thing for you to understand. In the beginning I was focusing too much on her getting that asshole out of the company because the injustice of it all was too difficult to accept. Doing something like that just causes the other person to feel like shit if they feel like they don't have the strength or the courage to go through all of that. That doesn't mean that you can't tell what you think is the best thing to do or search for different ways to get her justice, but at the end of the day it's her decision and you just have to support her.