"I'm extremely disappointed. We didn't defend at set-pieces and I'm angry about that," he said after the match at Loftus Road.
"Matt Connolly has to take his share of the blame for the first goal. If you're marking someone then you need to take responsibility.
"For the second goal Cerny should have done better.
"I'm angry because we were very good with the ball. We were confident, extremely bright and passed it well.
"But you also have to take responsibility and defend for your lives. That didn't happen. We fell asleep at set-pieces."