Manchester United dropped more points at Selhurst Park as they played out a drab 0-0 draw against Crystal Palace.
Since going to the top of the league table in January, Manchester United have failed to kick on, winning just three of their following eight games in the Premier League.
The performance at Selhurst Park was another example of some lacklustre football and McIlroy was particularly disappointed with the tempo Ole Gunnar Solskjaer’s side played at on Wednesday night.
He believes the pace of the game was not up to Manchester United’s standards and conceded that none of the players showed the bravery on the ball needed to get a win at Palace.
The former Red Devil said on MUTV post match: “We were not under any severe pressure [defensively].
“When we had the ball I don’t think our tempo was right, the way Manchester United want to play.
“I know the conditions were bad but that was for both the teams. It was a bit foggy and misty, but that is no excuse.
“It just wasn’t up to the standards for Manchester United tempo-wise and even passion.
“It was a game where we needed a little bit of magic, needed someone to be brave to try and win the game but unfortunately it wasn’t there tonight.”
Manchester United will look to bounce back as they brace for the derby against Manchester City at the Etihad on Sunday.