Looking at the facts, they only won in the 3 games when Lee Kang-in was absent.

Ecuador is a team that cannot be ignored, considering they even won a penalty shootout against Japan today.
Even accounting for issues like jet lag and physical fatigue, the difference between the Ecuador match and the Uruguay match was so vast that it was hard to explain,
but
they won the Ecuador match when Lee Kang-in did not play. - They ran desperately as one team.
I thought it would be even better if Lee Kang-in played,
but in the 2 matches where Lee Kang-in actually played—they didn't run as one team.
I feel like I might understand why, but... I'm not sure.
Moreno also follows Enrique's style, which requires constant running,
and from the perspective of Lee Kang-in, who hasn't secured a starting spot in Enrique's team, he might feel that he doesn't mesh well with Moreno.
It even makes me think that he might not want Moreno to be officially appointed as the manager. I hope that's not the case...