This is the 14343rd most frequent Korean word.
못했다면
"못했다면" means "if (someone) couldn't do (something)."
못했다면 serves to express the hypothetical failure of having done something properly.
그 일을 제대로 못했다면 지금 이렇게 큰 문제가 생기지 않았을 거야.
If they hadn't done that work properly, such a big problem wouldn't have arisen.
못했다면 denotes the conditional clause regarding the inability to win an event.
그 경기를 이기지 못했다면 우리는 결승에 가지 못했을 거야.
If we hadn't won that match, we wouldn't have qualified for the finals.
못했다면 highlights a hypothetical situation tied to the action of missing an opportunity.