Darren Moore felt his side made too many basic errors in the defeat to Sunderland in Sky Bet League One.
Four goals from Charlie Wyke sealed a 4-1 win for the home side, with Rovers’ consolation coming via a Lee Burge own goal.
Moore said: “From our point of view it wasn’t good enough, we started poorly and then gave a soft goal away after getting back into the game.
“I always felt we would come here and score today, but we couldn’t keep the door shut at the other end due to simple errors.”
After back-to-back defeats on the road, Moore says Rovers will go back to the drawing board as they work through a busy schedule in Sky Bet League One.
He added: “They’ve scored four headed goals and they could all have been avoided so we’ll go back to the drawing board on Monday.
“It’s a little bit uncharacteristic from our point of view because we’ve let our standards slip twice now in a matter of days.
“The only way to rectify that is to work on things on the training ground, and that’s what we’ll do leading into the next few games.”