YOU SAID:

My reputation massively dropped.

INTO JAPANESE

私の評判は大きく落ちました。

BACK INTO ENGLISH

My reputation has suffered greatly.

INTO JAPANESE

私の評判は大きく傷つきました。

BACK INTO ENGLISH

My reputation has been seriously damaged.

INTO JAPANESE

私の評判は著しく傷つけられました。

BACK INTO ENGLISH

My reputation has been seriously damaged.