Stuart Pearce claims the Manchester City fans were right to turn on his side after their poor first-half performance in Sunday's 2-1 defeat by Tottenham.
Calum Davenport and Tom Huddlestone fired Spurs into a two-goal lead inside the first 30 minutes which led to unrest among the City of Manchester Stadium crowd.
One fan was led away by police after attempting to confront Pearce and afterwards the City boss agreed with the supporters that the first-half showing wasn't good enough.
He said: "People pay good money to come here and I was frustrated as well. If I was in his position I would have come down and vented my frustration at the manager.
"The performance of the team dictated people's reaction and rightly so. The team were very, very poor for 45 minutes but for the next 45 minutes I didn't hear anyone venting their frustration.
"In the second half we rolled our sleeves up when maybe it would have been easier to go under.
"And at the end of 90 minutes maybe we deserved to get something out of it."