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ほうがよかった

would have been better

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phrase Rare #38,891
would have been better Often follows a verb in the past-counterfactual advice pattern, meaning someone should have done something. It can also compare things, as in “the previous one was better.”
JA: もっと早く出たほうがよかった。
EN: I would have been better off leaving earlier.

トムはメアリーに謝ったほうがよかったんだ。

Tom should have apologized to Mary.

彼らは黙っていたほうがよかったのに。

They should have kept quiet.

前のほうがよかった

The previous one was better.

— ROMA/ローマ (2018)

そっちのほうがよかったかな？

Would that have been better?

— Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020)

多分、トムにそのことを伝えたほうがよかったんだよ。

Maybe you should have told Tom about it.