You haven't met a good one. Let me introduce you to one, Jinzhou Wuzhilin Taekwondo, coach.
He has been a taekwondo teacher in primary school for 23 years. He is a master student majoring in Taekwondo in Sport University. He has won the national taekwondo championship and many provincial and municipal championships. Teaching experience 12 years. I brought professional teams from municipal sports schools, professional students from sports universities and more than 800 students who opened Dojo.
I have listened to his class. He practices well and teaches well. He is particularly passionate in class, and both children and parents say yes!