All parties in the club deserved to be blamed, and ten Hag as well, because of his poor coaching style, had a bad impact on the team's performance. Players, management, owner, and all other elements in the club have their own contribution to make the club successful. It's not fair if we are only blaming ten hag, though he was often making excuses, but I think the unsuccessful season faced by United last season has been the fault of all parties involved in Manchester United. I will not really blame him for the many injuries that happened last season. Injury was one of the reasons United conceded a lot of goals last season.
Ten Hag needs to ensure the same situation will not happen again. He needs to recruit non-injury-prone talent. In conclusion, a revamp is needed for Manchester United to replace all of their injury-prone players.
Now is not the time to blame each other, they have to introspect themselves and improve if they really want to see Manchester United be even better next season. There is no time for them to blame each other, it is better for them to make this a shared responsibility. However, they are a team and in a team I believe they have to rise together and when they are down they are down together. I mean everyone has to be responsible.
There is still time for them to show something even better, the question is will they want to or not? If it's true that they want to make a team this big fear their opponents again, then they have to make changes. It doesn't have to be done in a short time or done simultaneously, they can do it slowly, step by step.
When they can show a good development process, I think that is also good, because from there we can see that they are serious about correcting mistakes.