United find themselves 10th in the Premier League table after taking just 13 points from their opening 10 games of the season under the Dutchman.
The Red Devils host Crystal Palace at Old Trafford on Saturday, and Van Gaal is determined to oversee a victory following last weekend’s derby defeat by Manchester City.
Van Gaal said: “I feel for the fans and also the board because they have belief in me, my staff, and my players. Thirteen points from 10 matches, you are not doing well, but we are in a process.
“As I have said from the beginning, even when we won five games in the US, the process shall take more than one year. It shall take three years, I hope, though that is dependent on lots of things. But I think we will make it happen, that we will win a lot of matches.”
“I have the experience that people have great belief in what we are doing now, in the way we are playing football.
“When I am in the streets I am surrounded by very positive things, and when I’m in a car from United, there are lots of positive people.
“I’m feeling lousy for everyone that we have 13 points from 10 games. When I want to select the same line-up, I cannot. It’s the same every week.”
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news