Despite Bradley Dack's late goal to earn a point, Tony Mowbray was far from happy with his side's performance against Shrewsbury Town.
Aristote Nsiala deservedly put the league leaders in front just before the hour mark, but they couldn't make their domination count at the Montgomery Waters Meadow.
And with five minutes to go, a fine run and cross from substitute Harry Chapman, saw Dack fire home from close range to help Rovers claim a point, but Mowbray wasn't impressed with the overall display.
"I think it was probably our poorest performance of the season," said the Rovers boss after the match.
"I told them afterwards that it was an unacceptable performance from where I sat and watched it.
"They didn't carry out what we had worked on, and that allowed Shrewsbury to play their own game for long spells and we suffered for it.
"We have to accept that we take a point from the game and move on, but we have to be a lot better than that.
"I think it is two points dropped, but on the balance of play it is a point gained.
"I expect Blackburn Rovers to be a lot better than Shrewsbury Town and we didn't show that today. In fact we struggled for long spells in the game.
"The next game will have it's own identity, against a different team we'll play a different way, and we'll see how we get on in that one."
Rovers are back in action this Tuesday night when Rotherham United are the visitors to Ewood Park - kick-off 7.45pm.
Tickets for the match are currently on open sale, with prices from just £18 for Adults, from £11 Seniors/18-21yrs, from £6 for Under-18s and from £4 for Under-12s.
Don't forget 1875 Club members get money off all league home games.
Buy online now at www.eticketing.co.uk/onerovers/, in store at Ewood Park, or via the call centre on 01254 372000.