YOU SAID:

Austin is really annoying for not coming to school

INTO JAPANESE

オースティンは学校に来ないので本当に迷惑です

BACK INTO ENGLISH

It's really annoying that Austin doesn't come to school.

INTO JAPANESE

オースティンが学校に来ないのは本当に迷惑です。

BACK INTO ENGLISH

It's really annoying that Austin doesn't come to school.