YOU SAID:

This is so frustating

INTO JAPANESE

これはので frustating です。

BACK INTO ENGLISH

This is because it is frustating.

INTO JAPANESE

これ frustating だためにです。

BACK INTO ENGLISH

It's frustating to is.

INTO JAPANESE

それに frustating です。

BACK INTO ENGLISH

It is frustating.

INTO JAPANESE

Frustating です。

BACK INTO ENGLISH

It is Frustating.

INTO JAPANESE

Frustating です。

BACK INTO ENGLISH

It is Frustating.