Why is my mum so negative about me?

My mum only says negative things about me. I don’t know if I’m being too sensitive? I had someone tell me I’m a kind person, and I told my mum, she said “you’re not kind, you’re just a pushover.” Her boyfriend also said I’m not kind just “fake and polite.” They both then said I’m “not a strong person, just stubborn and obstinate.” I told her I got scouted to be a model and she goes “you don’t look like a model at all!” Like why is she always so negative? Everyone else is nice to me but my mum is so critical and her boyfriend always echoes whatever she says. Also, if I tell my mum she is just as stubborn as I am, she gets so offended and in a bad mood.

Why is my mum so negative about me?
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