Maguire was respectful when discussing Ruben Amorim, whose stubborn obsession with a back three ultimately led to his dismissal in January.
The English defender insisted the players must take responsibility for the failure of the previous system but was quick to praise the "smooth transition" overseen by the current coaching staff, which includes Jonny Evans and Steve Holland.
"I don't really have much bad to say about Ruben. I really like Ruben, he's got great ideas. The ideas just didn't work at Manchester United. It just didn't click, or work, and us players have got to take a lot of responsibility for that as well," Maguire said.
He stayed neutral on whetherCarrick should get the job permanently, stating that while the interim boss has been "amazing" and "tactically very good," the decision rests with the hierarchy.