Why can't I get the same support my parents give to my siblings?

I have a boyfriend and I met him online. He's 9 years older than me. But my mom seems doesn't approve of him. She bluntly said, "He looks old". But here's the thing, I have a sister who is now married. Her husband is 7 years older than her but he has babyface.

It's kinda tiring, they're always like this to me — in terms of education, career, and even relationship.
Why can't I get the same support my parents give to my siblings?
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