YOU SAID:
I have never thought of someone so badly.
INTO JAPANESE
私は誰かをそんなにひどく考えたことがありません。
BACK INTO ENGLISH
I have never thought of anyone so badly.
INTO JAPANESE
私は誰もそんなにひどく考えたことがありません。
BACK INTO ENGLISH
I have never thought so badly.
INTO JAPANESE
私はそんなにひどく考えたことがありません。
BACK INTO ENGLISH
I have never thought so badly.
That didn't even make that much sense in English.