Why did Zhang Xiaowu, a warm-blooded soldier, become a pirate and defect?

The TV series "Hot-blooded Soldiers" is being broadcasted. In the play, Zhang Xiaowu is a person whose personality has changed greatly. Zhang Xiaowu grew up under the care of his mother, but when his mother left, he finally stood up. Why did Zhang Xiaowu become a pirate in Hot Blood? Zhang Xiaowu is an admirable soldier in the play. I will reveal Zhang Xiaowu's true identity for you at the expense of our family.

Stage photo

In the play, Zhang Xiaowu is an urban otaku, a hacker and a computer expert. He grew up without a father and lived with his mother. Therefore, he developed a cowardly temper. When he is in trouble, he often chooses to give up and cry easily. He is as fragile as a girl and taken good care of by his mother, just like a child who has not grown up. After his mother was seriously ill, he made up a lie and sent him to the military camp to exercise.