Ole Gunnar Solskjaer admitted that he "made a couple of bad decisions" as Manchester United slipped to a 4-2 defeat against Leicester City at the King Power Stadium.
The loss saw United's 29-game unbeaten away run in the Premier League come to an end, and the Red Devils have managed just one point from their last three league games.
Solskjaer's men took the lead, but they were then overhauled and conceded a third goal less than a minute after pulling level again, before a stoppage-time goal for the Foxes sealed the result.
The Norwegian manager was unhappy with the manner of the goals his side shipped, but he shouldered the responsibility for the result which means United have won just once in their last five games across all competitions, losing three.
"When you look at the game, the four goals we conceded are all very poor," Solskjaer said to Sky Sports. "We didn't deserve to carry on the [unbeaten away] run. The performance was not good enough.
"We got a very good goal with Mason [Greenwood] and we were knocking on the door for another, but then some sloppy play and we concede. It was end to end but they created more chances. Two goals from set-pieces is disappointing and then seconds after equalising that should not happen [for Jamie Vardy's goal].
"I pick the team and Harry [Maguire] has showed no reaction [to his injury]. I hold my hands up if that doesn't work out and I probably made a couple of bad decisions.
"Lately, we have not been in great form and lost too many points. Something may have to change. Do we need more legs in there? What do we need? It is one that we have to really analyse. The one positive was Marcus [Rashford] coming back in. He’s got legs and is sharp so that's a big bonus.
"I've got many good players and every game is a different game. I am not going to put excuses up for the team I put out because it is full of top footballers and that was not good enough."
Despite United's poor form, Solskjaer insists he is not feeling the strain and is confident the team have the capacity to improve under his guidance.
"Every time you lose, the pressure builds of course, but we are used to living with that pressure," Solskjaer told the BBC.
"We are Man United; setbacks have happened before, worse performances, and we've got to bounce back on Wednesday. I'm going to do the job as well as I can; I believe in this team."
United's first opportunity to rectify their issues comes on Wednesday as they host Serie A side Atalanta in the Champions League.