結果・効果N2
〜あげく（に）
in the end / after all (often a negative result)
Structure
V-た形 + あげく（に）；N + の + あげく（に）
Explanation
Indicates that after a long time or great effort, something finally results, usually a negative or unsatisfactory outcome. Attached to the ta-form of verbs or noun + の. The main clause is often in the past tense and follows words like 考えた, 話し合った, 苦労した.
Examples
いろいろ考えたあげく、その会社に入るのをやめました。
After thinking it over, I decided not to join that company.
長時間の話し合いのあげく、彼らは離婚することになった。
After long discussions, they ended up getting divorced.
Note
あげく usually leads to a negative outcome; for a positive result, 〜末（に） is more natural. With nouns, use の + あげく.
Related Grammar
〜末（に）〜た結果