ばかりに

ばかりに is used to explain that a regrettable or unfavorable result happened specifically because of a preceding action or circumstance. It emphasizes the speaker’s sense that the outcome was caused solely or primarily by that cause, often with a tone of lament or fault. It is commonly used to connect a cause to an unintended consequence and tends to imply some degree of responsibility or fault on the cause. Not typically used for neutral or purely accidental results; it expresses disappointment or frustration about the outcome.