They can't fire Ten Hag because they should have paid £17.5m compensation to him. I think that's why they chose to wait for a positive result. Instead of sacking him, and recruit a new caretaker until the season's end. It's a double-edged sword for them.
My numbers above are according to the latest report
here.
If the board are conversing the compensation when they finally sack Erik Ten Hag from the club, it means they're not yet ready for a change. Erik Ten Hag is considered mediocre when it comes to managerial role, he's completely out of line though the board still trusts him to deliver good job for the club this season. It is too late for the Red Devils to bounce back on track? The Glazers are the one stopping Manchester United from reaching greater heights this season. They've become adamant to listen to the chants of the fans, which is definitely poor for the system.