Zidane is not a good and better coach than Erik Ten Hag, if he is a good coach, then he should explore and go do it with a lower club same way Erik Ten Hag has done and also Xabi Alonso with Bayern Leverkusen. People forget he was also under pressure during his last season in charge of Real Madrid. Immediately he they won the Champions League Competition, he quickly resigned do he would still maintain a beautiful managerial profile.
Zinedine Zidane and Erik Ten Hag are entirely different from the rest. We know the devastating measures that follows when we're talking about these managers. Zinedine Zidane have made accomplishment for important titles for Real Madrid and won the UEFA Champions League title 3 memorable times in a row, he clearly station Real Madrid to be an elite team and we understand the unique form of the club.
While for Erik Ten Hag, he's still consider mediocre despite winning 2 titles in two season for Manchester United. To mention these titles, it become more average because he didn't go in for the top titles. Erik Ten Hag will improved with time but in the mean time, he just have to stick to the current condition of the club and making plans to establish the club's standards.
To be sincere, even with all this record that you mentioned, everyone knows that Zidane is better than Erick ten Hag. If it has already been seen and known to everyone, the difference is already in reality. No one will say he doesn’t believe all the facts that you have already mentioned, although we might still say that Erick ten Hag can be a good manager in some years, but for now, I don’t think he is supposed to be compared with Zidane. but both of them have their own different strengths and patterns to achieve their goals and an interest in others to follow different paths to success, so we are hoping to expect more from them.