The things Rangnick actually said were much milder and obvious than what people here sometimes paint them as.
Like the famous "club needs 10 players" quote. He said, "The team needs a rebuild, not because some players have to go but quite a few have no contracts anymore, their contracts are expiring, then for me it's clear there will be six, seven, eight, maybe 10 new players." That is a trivial point: when you lose players, you replace them one way or another. Then he said, "And before you sign those players you need to be aware how do you want to play? " Another fairly simple point, does anyone actually think nobody at United has ever given the slightest thought to how they want to play?
United have hired Ten Hag, a manager with a clear style. They have signed some players that the manager wanted and that seemingly fit his style. They are still in pursuit of additional players and have been pursuing a 'system' player like De Jong for a million years. It's not like United are doing the exact opposite of what Rangnick suggested.