Some games really benefit from detailed analysis by people who are paid to watch every player on every play and assess their performance. That’s why Pro Football Focus grades can be useful even if they are subjective - none of us watches a game closely enough to monitor all 11 players on the field at once and we’re likely to miss things that a trained eye dedicated to a single game will notice.
Sunday night’s New York Giants’ massacre at the hands of the Dallas Cowboys was not one of those games that required detailed analysis.