Burnley boss Sean Dyche felt they always struggled to dominate Crystal Palace in their 3-2 defeat.
The Clarets went 2-0 ahead, but Dyche was never satisfied.
"We got a 2-0 lead and I didn't really feel comfortable with how the team was performing," he said.
"We didn't start particularly well and we looked slightly off all the details we do well and if you don't do them well enough you will get hurt.
"It is probably a bit harsh on us to lose the game but they did well enough to win it and we've done that to other teams.
"I said to them afterwards if you come one per cent off the performance levels then you are not guaranteed anything, you have to play hard all the time, and we were just off and just off it too far for us at this level of football.
"The hardest thing in management is to snap teams out of that performance level when they are just below par.
"You can do it when there are two or three but when it is five or six it is more difficult.
"It wasn't a radically poor performance but they were just off their levels and for a team which is learning you can't afford to do that."