Tony Mowbray was honest in his assessment after seeing his side's winning run in September come to an end at the hands of Luton Town at Ewood Park.
Academy graduate Matty Pearson came back to haunt Rovers as he headed home the winner midway through the second half at a drizzly Ewood.
Lewis Travis' spectacular strike had equalised for the hosts after James Collins' early opener for the visitors.
And speaking after the encounter, Mowbray says the mood in the camp is downbeat following the narrow loss against the newly promoted Hatters on home turf.
“There’s huge frustration and huge disappointment in what is a really quiet dressing room," he revealed to iFollow Rovers.
“It was a missed opportunity for us today. We wasted it and it feels bigger than just a wasted opportunity, it feels huge.
“Against a side who are newly promoted to this league, no disrespect to them, but if we want to be up there towards the top of this league then we need to beat teams like Luton Town.
“We had enough of the ball, but we have to be better when breaking down these sort of teams and you cannot give away soft goals like we did today.
“The combination of that was our undoing and it was similar to the opening day game against Charlton.
“We have been scoring goals and winning matches, but today was really frustrating. It was an opportunity to put a good performance in, win well, push up the table and look ahead to Tuesday night," he added.
“We needed to create more chances, get behind teams more, fizz balls across the box. We didn’t do that enough and didn’t have the guile.
“The individually of a Rothwell was probably needed for us today, that speed and craft, which was needed today.”