Before you walk away, there are many skills here that you can learn to make life easier. Nothing will "fix' her, but these skills allow you to talk better with her, to feel more in control, and to stay healthy.
I would suggest trying these skills first - see how they go - before you make up your mind.
The first skill is Validation. This is a conversation technique to allow her to feel heard, which should reduce her rage. It is often difficult for men to do because you ignore her actual words, talk instead about her feelings, and offer no solutions! But it works. Read about it here:
https://bpdfamily.com/message_board/index.php?board=36.0She tells me that she feels unloved, unwanted, and unimportant. And she is frequently finding things that she claims to be evidence of this.
This is the core of a BPD - feeling unloved. There is nothing you can do to "prove otherwise". With Validation, you can LISTEN and provide support. Often this is enough to help them feel better. The next skill will be SET, where you can start to show them they are wrong - but you have to do the Validation first or it won't work. Small steps... .
Read up on Validation. Then post some conversations so we can guide you.