you a bitch
It’s called copula deletion, or zero copula. Many languages and dialects, including Ancient Greek and Russian, delete the copula (the verb to be) when the context is obvious.
So an utterance like “you a bitch” in AAVE is not an example of a misused you, but an example of a sentence that deletes the copular verb (are), which is a perfectly valid thing to do in that dialect, just as deleting an /r/ after a vowel is a perfectly valid thing to do in an upper-class British dialect.
She said, ‘It’s more important to be kind than to be right. And petty victory won’t keep me warm at night.’
I have this dream in which I’m falling.
With a sinking feeling in my stomach,
Well it’s odd because
I recognise the feeling
having never fallen fourty feet.
They took her out in darkness
on the orders of another,
and burned her as a witch
although she was a mother.
Cries of the children
rang out among the trees;
as the woman, who was a mother,
fell down upon her knees.
They dragged her by the arms;
her knees a skuffled red
then dropped a heavy noose
over her helpless head.