YOU SAID:

I never saw a sight, that didn't look better looking back.

INTO JAPANESE

振り返ってみると良くない光景を見たことがありません。

BACK INTO ENGLISH

Looking back, I have never seen a bad sight.

INTO JAPANESE

振り返ってみると、悪い光景を見たことがありません。

BACK INTO ENGLISH

Looking back, I never saw a bad sight.

INTO JAPANESE

振り返ってみると、悪い光景を見たことはありません。

BACK INTO ENGLISH

Looking back, I never saw a bad sight.