YOU SAID:
My dad and my mom and my sister are not better than me
INTO JAPANESE
私の父と母と妹は私より良くありません
BACK INTO ENGLISH
My dad, mom and sister are no better than me
INTO JAPANESE
私の父、母、妹は私に勝るものはありません
BACK INTO ENGLISH
My father, mother and sister can't beat me
INTO JAPANESE
私の父、母、妹は私を倒すことができません
BACK INTO ENGLISH
My dad, mom and sister can't beat me
INTO JAPANESE
私の父、母、妹は私を倒すことができません
BACK INTO ENGLISH
My dad, mom and sister can't beat me
That didn't even make that much sense in English.