The former United striker believes the Dutchman must revert from his 3-5-2 formation.
After three Premier League games, the Dutchman's side have a meager two points to their name - far from the standards maintained under the title-winning Sir Alex Ferguson.
And, according to former United striker Michael Owen, Van Gaal is getting in his own way.
Indeed, Owen believes the Man United boss must switch his 3-5-2 formation to a 4-4-1-1 to capitalise on United's man-for-man advantage over their opponents.
A failure to do so cost Van Gaal another two points against Burnley, according to the 34-year-old.
"How long before Van Gaal reverts back to 4-4-1-1? Players can't get to grips with 3-5-2," Owen wrote on Sportlobster.
"When your back is against the wall, why wouldn't you just match up with your opponents? Player for player, United are better so the simplest way to go is to match up man for man.
"As it was, Burnley's system worked better than United's and it's another 2 points dropped."
Manchester United will now host Queens Park Rangers after the international break.
No opponent can be considered easy for Van Gaal's side anymore, though, as they have failed to beat anyone so far this season - including League One side Milton Keynes Dons, who thrashed them 4-0 in the Capital One Cup.