YOU SAID:

tomato sauce is gross.

INTO JAPANESE

トマトソースがイマイチ。

BACK INTO ENGLISH

Tomato sauce is not good.

INTO JAPANESE

トマトソースが苦手。

BACK INTO ENGLISH

I don't like tomato sauce.

INTO JAPANESE

私はトマトソースが苦手です。

BACK INTO ENGLISH

I don't like tomato sauce.