YOU SAID:

Things went as badly as it can

INTO JAPANESE

物事は可能な限り悪い方向に進みました

BACK INTO ENGLISH

things went in the worst possible direction

INTO JAPANESE

事態は最悪の方向へ進んでしまった

BACK INTO ENGLISH

The situation has taken a turn for the worst.

INTO JAPANESE

状況は最悪の方向へ変わってしまった。

BACK INTO ENGLISH

The situation has taken a turn for the worst.