The Hoops scores three times inside the final 10 minutes to clinch a 5-2 victory at Loftus Road.
The caretaker manager told the club's official website: "The scoreline indicates we were battered, but that wasn't the case. The game was set up for us to go on and win and it's hard to explain how we have lost 5-2.
"I was disappointed with how we started the match. There was no real intensity to our play and we went a goal down very early. We gave ourselves a job to do.
"We spoke at half time about trying to increase the tempo and trying to play in QPR's half a lot more, which we did without creating too many more clear-cut chances, but we got level again with another good goal from a set piece and we looked good to go ahead and pick up a draw at the very least."
The result leaves Forest without a win in their last 12 matches.