Van Gaal’s side has won eight of eleven outings with victory at the FA Cup third-round.
Van Gaal told MUTV: “I felt not so happy myself because I was responsible and guilty for the results so I am very happy we won a number of matches in a row. We are still building up a process.
“I think, as a trainer, coach and manager, that I have to analyse the performances of my players because that is the most important thing and that shows how far we are in the process.
“That is still not good enough, in my opinion, but I hope we shall improve.”