YOU SAID:
i'm sorry that i'm such a disappointment
INTO JAPANESE
がっかりしてごめんなさい
BACK INTO ENGLISH
I'm sorry to be disappointed
INTO JAPANESE
がっかりしてすみません
BACK INTO ENGLISH
Sorry for the disappointment
INTO JAPANESE
失望してすみません
BACK INTO ENGLISH
Sorry for the disappointment
You should move to Japan!