Looks like her temper is deep rooted in her. Even if she changes, it will still surface from time to time. Can you accept that?

You seemed afraid to be seen as the 'bad guy'. Why? You should defend yourself even if it means arguing with her in front of other people. I would assume over the 7 years, people surrounding you would have known that you give in to her most of the time. So if you stand your ground at this stage, I don't think people will blame you. At the same time, so what if people did? You want to suffer like this for the rest of your life? YOLO.

All your description of her in the thread is negative. You don't see anything positive in her? Then move on.