The Dutchman’s side have only won three of their last ten Premier League games and have fallen six points behind fourth placed Manchester City.
Rooney insists the manager isn’t entirely to blame for Man United’s disappointing showings.
He said: “At times it’s been frustrating for us as we have under-performed. The manager has taken a lot of stick for some performances. It’s down to us, we’re players and we have to perform.
“In terms of that we have probably got off quite lightly and the manager has taken a lot of it.