I hate to say this, but I don't think she'll ever like Pippa the Ripper. It showcases a lot of her weak points (singing in an uncharacteristically high manner, autotuned to hell and back), and the song still sounds like it was written for somebody else. Pippa's story is not even close to what's said in the song. She genuinely hates it, and I wouldn't be surprised if at some point in the future she releases a song more befitting of her personally and deletes Pippa the Ripper entirely. It's time to accept it.
Yes, the song is catchy, and its hard to get out of your head, but she personally doesn't like it because of it being a terrible representation of herself.