YOU SAID:

you could do better than that, you idiot!

INTO JAPANESE

あなたはそれよりも上手くできるだろう、ばか！

BACK INTO ENGLISH

You could do better than that, idiot!

INTO JAPANESE

あなたはそれよりも上手にできるだろう、ばか！

BACK INTO ENGLISH

You could do better than that, idiot!