A lot of pseudo-psychology from the so-called experts. "He destroyed him", "He killed him", etc. It may say a bit about how individualistic the culture has become.
DF had to make a rational decision: he would delay the time, stop the rhythm of the match, and do so by making a substitute. As he himself says he had the bench full of strikers, and DCL and Richarlison worked tirelessly. It would be stupid to substitute them.
Kean on the other hand, struggled with the pace and intensity, and possibly he did not follow the instructions. Therefore, he was also a risk, which could ultimately cause us to lose the match. The team comes first, and that's the attitude all Evertom players need to be aware of. Consequences are far more effective than words. Words usually have the opposite effect.
For Kean now, the job of the coaching staff is to reinforce the positive, but at the same time set clear boundaries. I don't give up Kean yet, it's a good player there, but I have the feeling that he is a player who has an extraordinary talent but is not willing to work to realize the potential.