The parents who do not discipline their child create an individual who is used to making the rules and getting what they want all the time. The child will often react with temper tantrums if anyone does not do what the child desires.
Young teachers straight out of college have often been trained the same way. Their administrators have set them up as gods and goddesses letting them make the rules and set the standards. I know this is not true for all but it did happen in my former department. It came as no surprise when the young teacher, not getting her way in a new environment had a melt down. No one every said no to her before.
It is hard to blame the spoilt child although no one likes this individual. The young teacher has been raised the same way. I imagine she should not be blamed either.