The Addicks slipped to a 1-0 defeat at Birmingham on Saturday in what Luzon described as their worst performance since he took over in January.
They host promotion-chasing Bournemouth in their final match next Saturday and Luzon has demanded an improvement.
“We were really, really disappointed and frustrated because our target is to play positively every game,” he said.
“We really don’t like that kind of performance but it’s our last game next week and we have to improve and to play better. In football it is not only about the result, but also about the way you play.”