The only reason the United hierarchy can keep Erik Ten Hag is because of the sheer number of injuries he had last season, his argument would be that if he had a fully fit squad, or at least if most of his players were fit for a major part of the season, then he would have competed better. He would also argue that he has won two trophies in two seasons, and the big trophy (EPL title) is somewhere along the line.
If a bad season is easily explained by player injuries, it's easily for many coaches to secure their jobs. We can see how Klopp and Xavi faced with injury storms in their clubs this season and previous ones. They did better than Ten Hag and their team general sentiment is not too negative like what Ten Hag did and created in Manchester United. The sentiment perhaps is magnified by media and I have no issue with Ten Hag, I have no interest to criticize him but as a football fan, not a fan of Manchester United, I feel that he did not make his good management, from tactics to human administration.
The dilemma now for the hierarchy at United is that Ten Hag has just one year left on his contract, so if they are going to give him another season, it means they trust him and then they have to extend his contract.
If they give him one more season to prove, they must think clearly of what they will do next summer if similar ending comes. If performances are better, it's easy to decide but if it is the same, not yet say worse, a harsh and determined decision to sack Ten Hag, next summer, should be made without hesitation.