And the Rangers manager says the result told him everything about exactly where his side is in terms of its progression at this stage.
McCoist didn’t mince his words after dropping points for the second time in three Ibrox games and has warned his players they must improve.
He knows supporters demand far more from the Light Blues and agrees they should be seeing much better performances from the men at his disposal.
McCoist hopes the final result and the manner it came about acts as a wake-up call to his misfiring stars.
He said: “I’m probably as angry as I’ve ever been - certainly as a manager - with that performance.
“I’m not even interested about Montrose’s wonder goal with two minutes to go. You could absolutely see it coming.
“Our overall performance was not good enough and our standard of finishing was probably worse than that. The players had better switch on or they’ll be completely switched off.
“Today just told me I was right in that I knew where we were, effectively. The result next week (against Dundee United) won’t tell me anything I don’t already know.
“This match confirmed where I thought we were. I would hope today’s level of performance will act as a wake-up call for a lot of the players, not even just one or two.
“My disappointment covers the entire team. I said to them after the game we live and die as a team. That will always be the case and the individuals within the team know that themselves.
“That level of performance can’t and won’t be tolerated. It seems a bit bizarre saying that when we’ve had only two draws in 14 games.
“But the supporters deserve a better level of performance than they got today. Montrose had chances as did we and they were good ones. Our finishing has to get better.”