YOU SAID:

I'm sorry that you let me down

INTO JAPANESE

私は私をするがっかり残念

BACK INTO ENGLISH

I will make me disappointed too bad

INTO JAPANESE

私が私はがっかりしてあまりにも悪い

BACK INTO ENGLISH

Too bad, I was disappointed I

INTO JAPANESE

あまりにも悪い、私は失望した私

BACK INTO ENGLISH

Too bad, I was disappointed I