It’s infuriating that she dismissed therapy immediately. She could step away from social media, that feeds her attitude and behaviour, truly immerse herself in therapy and getting help. She COULD change if she really wanted to. But that’s too hard. Like you say, it’s easier to stay in her comfort zone and spew hate.
I also think she’s massively dumb and has no self awareness, so would never see it like that. And she has narcissistic tendencies, and feeds off the attention she gets from her ‘job’, no matter how negative.