Yeah, if there's one thing that Tifo video highlighted (not that we needed it highlighted) is that every fecker on that pitch acts as an individual. They act on their own whims, randomly going into areas of the pitch when they feel like it, leaving others around them exposed, which in turn means that they have to cover for the player who's just gone AWOL, which leads to a domino effect where every fecker is out of position and there's space everywhere. We see it time and time again. It's all impromptu, off-the-cuff football.
No one knows what the other player is doing. That's why we always get players in each others' pockets. Or we have players running into each other (Shaw and Maguire yesterday). Absolute chaos.
Also, a very good point on McTominay. He's a good player, but he's not a DM. He's much better further up the pitch, yet we persist with playing him as a DM because...reasons.