Louis van Gaal vowed not to change his style of football as Manchester United were held a 0-0 draw by West Ham on Saturday.
United's Premier League stalemate with the Hammers saw Van Gaal's side record a fifth 0-0 draw in nine games, with the Red Devils scoring just three times in their last six matches at Old Trafford.
But the Dutch coach said his brand of football has been the key to his success at Ajax, Barcelona, Bayern Munich and AZ Alkmaar, and insisted he will stick with his much-criticised philosophy as he told fans not to urge his team to attack.
"If they don't like my style of Manchester United, everyone knows all the teams of Louis van Gaal play like that," he said in his postgame news conference. "If you have that question, OK, that's where I have been in Barcelona, Bayern Munich or AZ. We played like that.
"It is a question of scoring that goal and we didn't do that. That's our problem. The fans are disappointed. I know because I am also disappointed and so are my players.
"They want to score every minute of this game. I don't understand [why] they are shouting 'attack, attack, attack' because we are the attacking team, not West Ham, and it's the same in every game because we are dominating more."
Van Gaal insisted he was happy with the way his side played, despite having just one shot on target in 20 attempts.
"I am pleased with the performance," he said. "When you create these kind of chances you have to finish. I cannot say we played bad. We started well and after that it was an equal game.
"We dominated the second half and created a lot of chances and then you have to score. They could have scored also. They defended well but we created more chances than in the last matches so that was the most important aspect."
Morgan Schneiderlin and Paddy McNair are doubts for United's Champions League clash against Wolfsburg after coming off with injuries.
United were already without six sidelined players, and saw their problems increase as the midfielder and the defender could join Wayne Rooney, Ander Herrera, Phil Jones, Marcos Rojo, Luke Shaw and Antonio Valencia among their absentees.
France international Schneiderlin came off with a hip injury while Northern Ireland's McNair was withdrawn at half-time with an ankle problem.
"I hope they can play on Tuesday but it's a big question mark," Van Gaal told MUTV.
West Ham counterpart Slaven Bilic was unable to claim a fourth major scalp on the road, but was happy with his team's performance.
The Hammers boss, who has seen his team beat Manchester City, Arsenal and Liverpool away from home this season, said: "We could have or should have been in front. I think we deserved at half time to be 1-0 up.
"We hit the post twice and had one great chance from Victor Moses. It is not very common for West Ham to come here and take something away. It is a good day."
The only disappointment for Bilic was that referee Mark Clattenburg failed to send Schweinsteiger off for what the Croatian deemed to be an elbow on the exceptional Winston Reid.
"It was a moment of madness," Bilic said. "He deserved to be sent off, but the referee told me he didn't see it. Fair enough, I believe it. It was an elbow."