YOU SAID:
I wish that you would've treated me bad
INTO JAPANESE
私はあなたが私を悪く扱ってくれたらいいのに
BACK INTO ENGLISH
I wish you treated me badly
INTO JAPANESE
私はあなたが私をひどく扱ってくれたらいいのに
BACK INTO ENGLISH
I wish you treated me badly
That didn't even make that much sense in English.