Daniel Farke felt his side deserved more from Tuesday night's 1-0 defeat to Nottingham Forest at The City Ground.
The Canaries had been gradually asseting themselves as the dominant force in the contest, only for Daryl Murphy's late strike to give the hosts all three points.
"After the last game I had to criticise my lads," Farke told Norwich City TV after the match.
"We were the better team in the second half too. Then out of a situation that was simply a cross from half-field, we didn't react quickly enough and conceded.
"We tried everything and created some more chances so it's hard to accept this loss."
Farke says an improved display gives him confidence results will pick up soon, starting with the weekend visit of Preston North End to Carrow Road.
"I'm more worried when we have a performance like we did on Saturday," he added.
"I'm a deep believer that you earn what you invest. If we play like we did today, we will earn the benefit.
"It's hard to accept immediately, 100 per cent. It's another setback but we have to work further on with this attitude.
"We had several situations where we could have scored but didn't. When we play like this, normally we will win games."