McCulloch was gutted after Rangers were shocked on Saturday afternoon by lowly Stirling Albion who claimed a 1-0 win over Ally McCoist's side.
The stuttering away form means that Rangers have drawn three and lost one game on the road and McCulloch believes that the result in Stirling has to shock the Ibrox side from their lethargy in the league.
When asked if the games in the bottom tier had been different from what had been anticipated, McCulloch said: "100%. Everybody thought that we were going to turn up to every league game and win it 6-0 and 7-0, but the passion their players showed on Saturday shows that isn't going to be the case.
"I think it's a reality check for everybody about the standard of football."
But the Ibrox stalwart has also insisted that there is no attitude problem in the Rangers dressing room.
There have been accusations that the players, the bulk of whom remain on SPL terms, don't fancy rolling up their sleeves and getting stuck into the more basic side of the game, but McCulloch has denied that.
"I wouldn't say anyone in the dressing room has a bad attitude," he said. "I honestly don't know why.
"It is probably because we are not taking our chances.
"I wish we could put our finger on what is wrong. I don't think it's attitude but they maybe defended a bit better than us."
Pressure is beginning to grow around McCoist, although McCulloch has maintained that it is up to the Rangers players to get the club out of the mess they are in.
They remain only one point off the pace of Queen's Park who, with a game in hand over Gers, top the Third Division.
But it is the embarrassing nature of the results and performances on the road that is angering the Ibrox support.
There is now a break as the international fixtures come to the fore and McCulloch has urged his team-mates to use the time to get the heads down and get to work on the training ground.
"I wish there was another game tomorrow but it's into the international break now and maybe that'll give us a bit of time to regroup and look forward to the next game," he said.
"There was anger at half-time and full-time but we need to get on with it.
"We wanted to get that result for the manager and it wasn't to be but all we can do is go into the next game and try to win that one for him.
"It is still early in my book and there are still points to play for. It is all about winning the league.
"We have got to respond to it because it isn't acceptable. We owe it to the fans, to ourselves, the manager and everyone at the club."