YOU SAID:

You should be with him I can't compete.

INTO JAPANESE

競合することはできません彼と一緒にする必要があります。

BACK INTO ENGLISH

You cannot compete should be with him.

INTO JAPANESE

あなたは太刀打ちできない彼と一緒にする必要があります。

BACK INTO ENGLISH

You can't beat him.

INTO JAPANESE

彼を倒すことはできません。

BACK INTO ENGLISH

You can't beat him.