One problem is parents walking away from the parenting role. Also, a lot of parents actually don't know how to raise children. I was shocked by the amount of bad advice I was receiving from parents when I had my daughter.
From my experience, a lot of couples have children because they are expected to, not because they want to. Nobody prepares them to become parents. Especially at this modern age, parenting is completely different now than what it used to be.
Also, children who grew up during the pandemic were isolated from society and human interaction for too long. This negatively affected their behavior.