United may be third in the Premier League, but that has not saved their manager from criticism.
The first signs of unrest came last month at QPR when United fans demanded Van Gaal ditch his three-man defence by chanting “4-4-2”.
The 63-year-old has acquiesced to their demands in recent weeks, altering the formation to a 4-4-2 diamond, but he concedes that even though the season is nearly three quarters of the way through, he still has not found a settled line-up.
“No, I don’t think so,” Van Gaal said when asked if he had found the right balance in his team.
“I have played now already five or six systems and I am looking still for the balance. But this system is more attractive than normally and I can play with more attacking players.
“That’s the reason I am doing that.
“In spite of the fact that we are looking for the balance, our results are not bad and our defensive organisation is not bad, we also score a lot of goals. So, I cannot say that I am very disappointed about that. But we have to it now, and normally you have to do it pre-season.”