Ralf Rangnick has slammed his Manchester United players for failing at the "basics".
On Tuesday United were thrashed 4-0 by rivals Liverpool, who won 5-0 at Old Trafford earlier this season.
United have only once suffered a combined heavier defeat in a league season - 11-0 against Sunderland in 1892-93.
"In training we haven't been on the level I'd like," said Rangnick. "We are very far away from football I would like to play.
"Even if I watch Burnley and they are fighting to stay in league, the way they defended and didn't allow Southampton a single chance...
"This is what I mean by basics, and those are things we need to show in the next games."
Asked if incoming manager Erik ten Hag will require patience, Rangnick said: "I would rather say the level of expectations. This has also got to do with patience, yes, but in a club like Manchester United it is difficult to tell people to be patient. It will take time.
"We have to face current situation. We lost on aggregate to Liverpool 9-0, Manchester City 6-1, lost to Watford 4-1 and lost to Everton, who are not full of confidence.
"This is just the sad reality. It makes sense to have sense of reality and not accept but acknowledge it. It would also help Erik ten Hag for the future."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!