I agree the Cowboys looked stupid and undisciplined but they lost the game right after the opening kickoff. The 49ers just bullied them 75 yards for a TD to take the lead. The Cowboys were 2-6 this year when they did not score first and 10-0 when they did. The way the Cowboys allowed the 49ers to easily push their way into the end zone never even getting to a 3rd down and running 4 consecutive 11 yard+ plays showed which team came to play and which team was not ready, even for a playoff game. To me, the game ended right there. The Cowboys simply could not stop the 49ers offense from scoring while their offense looked amateurish.
Likewise, the first time Dallas got the ball, they went incomplete pass, minus 3 yard rush, sack for a 10 yard loss. 3 and out. 3 plays -13 yards.
The team that comes to play, plays with urgency and intensity usually wins. That wasn't the Cowboys. They looked flat like it was just another game. The 49ers came out on fire. The Cowboys never matched the intensity of the 49ers. This is the #1 reason why the Cowboys have not been to a championship game in 26 years.