are there any free experienced coaches who can replace Solskjaer? it's easy just to sack him but new coach will need some time to adjust to his new team and it may also cost lost points.
it's not easy to fire him. MU doesn't have money to pay his severance pay and in reality, the official very much loves him even if he loses in the next game he will stay until finishes. If Ole has the shame, he has to resign and give the chance for another coach. Many free coaches out there who are ready to MU (but they won't it). It's okay, even if they lose, MU still has lots of money coming to the stadium just for watching Ronaldo, that the points.
The Manchester United board is confident in Ole's ability to turn things around; they see him as a long-term club project, similar to how Alex Ferguson's first 2-3 seasons at Manchester United were a total failure, with fans calling for his sacking before he turned things around and placed the club's history where it is today.