A "power struggle" refers to conflict or competition between individuals or groups who want to gain or maintain control, authority, or influence over a situation or others. Full definition
But most of the tantrums are power struggles between Parents and preschoolers, and much of these are from time constraints. (law-of-attraction-parenting.com)
He teaches that children learn best from experiencing the natural consequences of their actions, and it's pointless for parents to get caught up in power struggles with their kids. (fathers.com)
It is best to try to stay out of power struggles with your child. (kidsmatter.edu.au)