A feeling of disappointment or frustration when goals or expectations are not met; can occur in both short- and long-term situations.
大学受験に失敗して大きな挫折感を味わった。
I experienced a great sense of frustration after failing the university entrance exam.
何度も挑戦しても結果が出ず、挫折感を抱くことがある。
Even after trying many times, you may feel frustrated when there are no results.
小さな成功体験を積むことで挫折感を和らげられることがある。
Accumulating small successes can sometimes ease feelings of frustration.