If you are looking for perfect games by a QB, I think you are going to be disappointed. Look around the league, how many QBs are having perfect games each week?
In all of those situations you named, has the running game helped out? Has the defense got a stop to get the ball back to the offense in good field position? What about special teams, wasnt there a return out to the 50 yard line that was called back from a penalty on special teams on the last drive against Denver? Dont you think the play calling would have been different at the 50 than at our own 15?
My point is that it is a team game and no one man can single handedly win the game. However, in all of these late game situations you have named, nobody else has stepped up to make any plays at all. It is totally on Romo to either win or lose us the game.
That is what the real problem with this team is and until that is fixed we are probably not going to win too much. Remember, John Elway never won a SB until a guy named Terrell Davis and his salute showed up.