Hello, Mr. Hong Jong-wook. This is StartCoding. First, I am truly sorry and regretful that we seem to have failed to provide satisfaction despite your valuable time spent on our course. In fact, I too have had experiences where I felt disappointed while taking other courses, thinking 'It would have been better if this part had been more complete.' I deeply understand how you must have felt. If it's alright with you, could you please tell us more specifically about which aspects of the course quality you found disappointing? I would be grateful if you could contact us comfortably at kkj6369@naver.com. Based on your feedback, we will do our best to review and improve the course content to provide better courses. Thank you for giving us an opportunity to improve through your valuable opinion.