(Pro 17:25 KJV) A foolish son is a grief to his father, and bitterness to her that bare him.
Don’t jump to conclusions. “Foolish” (3684) children are a real problem and a burden but don’t confuse childish immaturity with being a genuine, unadulterated, total fool. Children can be embarrassing. I should say, “Will be embarrassing”, but a lot of that is grounded in your lack of a healthy sense of humor. As I enjoyed my granddaughter on a recent visit I thought about how often I could find it embarrassing that she left more food on the floor than she got in her mouth. That is not being a fool, it is being a child. It is being a learner. If my adult children did the same, that would say something about my parenting skills.
Childish foolishness will go away with training. Youthful foolishness will hopefully be the same. If you are still a fool when you become an adult, then we have some serious issues.
So? Be patient and keep training when it comes to your children. Be anxious and repent when it is you. God is trying to communicate. It is up to us to listen.