Yeah there were a lot of recent posts regarding map hacking, I just wanted to provide an example where hacking affects ladder experience. One of top FFA players (№26 currently) is a blatant map hacker.
Video proof: https://www.youtube.com/watch?v=kcRr2Ej3_Xk
His profile: caasdsa – AoE4 World
Current nickname: caasdsa
I already reported him in game, he went offline for several days and now continues playing and cheating again.
I recorded the most obvious case where he finds enemy king hidden in the forest in the corner of the map without even scouting it. And he sends knight straightly to kill him in the fog of war. He also constantly looks at enemies bases in the fog of war, but that happens with him all the time in any replay, so not worth recording.
I suggest to report him together.