This just seems normal and expected.
Kids are raised by their parents. Parents try to impart their wisdom on their kids, often in the form of rules meant to protect them. These rules are necessarily over restrictive due to simplification during various ages. These rules are also out of date with the new generation.
It's always a right of passage for children to find their own values and how they align with ideologies they have experienced or discovered in the world. And kids thinking their parents messed them up is really just an expression of value mismatch.