How do you know if the behavior of your kid is abnormal or is just like his donor parent? Frustrated with habits.

Could be both, or it. could be expectations vs. reality. If your child spends more than an hour/day performing repetitive, non-functional rituals, that is atypical behavior. A child with academic, behavior &/or peer interaction problems that cause him harm needs evaluation & treatment, including family therapy. Though not intentional, parental frustration can harm a child's ability to develop a positive sense of self.
Compare. One way is to compare his behavior with his peers. Another is to consult with a child care specialist such as his teacher to see if his behavior is abnormal.