What do you think of son preference?

I was born in a patriarchal family, and I was wronged since I was a child. I feel that I picked it up in the trash can, and I can't feel the love of my parents at all.

I remember when I was ten years old, my parents went out on business and asked me to take care of my five-year-old brother. At that time, my brother was very naughty, and I broke my mother's favorite vase when I wasn't paying attention.

When my parents came home, they blamed all the mistakes on me. At that time, I replied, "My brother did it." .

Dad kicked me directly and kept saying, "It's your fault. Who told you not to value your brother?"

In this way, I took the blame for my brother, but nothing happened to him. At that moment, I shuddered. I was born to my parents, too. Why is the treatment different?