The Hammers support turned on the players after the loss.
"No disrespect but we should have beaten Wolves," said McCarthy.
"We get stick from the fans. You hear things people are singing and it hurts. No one in the dressing room wants to walk out and hear that.
"Against Stoke we have to play like we've never played before and, hopefully, the fans will appreciate that and we'll start getting them on our side again."