Whats wrong with me?!

You used to love me,
Now you could cate less,
It seems you hate me,
Is it true?
Do you hate me?
You threats and yelling,
Physical punishment?
Why?
Youve replaced me in your heart,
Just like you did my brother with me.
You used to love us.
Was it all a lie?
Did you just have adopt us to make you seem like a good person?
Theres a word that describes people like you,
Yet i dont say it.
My one question to you is what did i do to deserve this?