Tony Mowbray expressed his frustration after Rovers conceded a late equaliser in Monday's 1-1 draw at Rotherham.
The Blues took the lead through Bradley Dack's second-half goal but were forced to settle for a point following David Ball's 89th-minute leveller.
Speaking after the game, Mowbray said: "I think we deserved to win the match. We were frustrated to come in at half time with the scores level.
"We had the ball kicked off the line three times in the space of five seconds, but credit to Rotherham. We're just frustrated with the manner of the goal we conceded today.
"I think it was the only way they were going to score, and we invited the pressure in the last few minutes. But never mind, it's a learning curve for us - we have to learn and take it into the next game.
"The team are doing fantastically well, we deserved to win today but didn't. We played a team today that are confident and physical, they ask questions of you but I thought we generally saw that off today.
"After going ahead I thought we'd go on to get a second but, frustratingly for us, we invited the pressure late on.
"We'll win games when we're not playing particularly well, so we just have to keep going. Let's keep up our resilience, because all teams in this league are finding it hard to beat us.
"When it clicks, it's really good. I thought we were desperately unlucky not to win against Scunthorpe; today we saw off their physical threat and scored a great goal, but it wasn't to be.
"There's a fantastic spirit here and I'm sure that will see us through in the end."