Final answer:
Mr. Alacran is miserable because he cannot change his behaviors due to his military commitment.
Step-by-step explanation:
Mr. Alacran is miserable because he is in a situation where he cannot change his behaviors due to his commitment to the military. This is mentioned in the first reference provided. He has signed on for a four-year term and it is legally binding. Therefore, he is unable to leave and this is contributing to his misery.