来ればよかったのに

you should have come

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phrase Rare #24,319
you should have come Expresses regret or mild criticism that someone did not come. Literally, it means that it would have been good if they had come. The subject is often understood from context.
JA: 昨日のコンサートに来ればよかったのに。
EN: You should have come to the concert yesterday.

きのう来ればよかったのに

You should have come yesterday.

パーティー来ればよかったのに

You should have come to the party.

昨日来ればよかったのに

You should have come yesterday.

— 甘い生活 (1960)

あなたも一緒に来ればよかったのに

You should have come with us.