Everton manager Sam Allardyce said he was “very angry” about a “pathetic” and “unacceptable” display as they lost 5-1 at Arsenal in the Premier League.
Allardyce accused his players of failing to follow his instructions as they fell 4-0 behind by half-time.
Having switched from a back four to a three-man central defence, he witnessed a disorganised display.
“I have a lot of trouble with the players taking on to the pitch what we asked them to do,” Allardyce said.
Describing the display as a “disaster”, he added: “I’m not frustrated. I’m angry – very angry – at the players performing to that level. It’s unacceptable.
“The players are showing so much inconsistency that I face an uphill battle trying to get them to play at their best week in, week out. It was a pathetic first-half performance.”
Allardyce won three of his first four league games after taking over from Ronald Koeman in November.
However, Everton have won only one of nine matches in all competitions since, scoring five goals.
Allardyce said he set up his team at Emirates Stadium on Saturday to mimic the 5-4-1 formation that Swansea had used to beat Arsenal 3-1 on Tuesday.