Girls, How to help my girlfriend who thinks she isn’t good enough for anyone?

My girlfriend and I were having a talk about what was on our minds lately or stressing us out, and she said that she always feels like she’s never good enough for anyone.
I already know why she feels like this. Her father has always been emotionally abusive, criticizing her no matter what she does. But I don’t know what to do to help her. I try my best just to make sure that she knows that her worth isn’t determine by how other people see her. But her insecurity has also made her stressed about not having close friends even though she does. Or she also wants to get famous, but she even knows that no matter how many followers she gets, she’ll never be satisfied.
I guess what I’m asking is how do I make her feel like she’s enough not just for me but for everyone? But also get that mindset out of her head that she doesn’t need other people’s praise (for lack of a better word)?
She’s also been going to therapy for a while now and her therapist has been somewhat helping her with it, but no matter what we tell my girlfriend, she refuses to believe. Which I get.
Girls, How to help my girlfriend who thinks she isn’t good enough for anyone?
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