I think what you said is not correct because Erik Ten Hag has not been able to maximize Manchester United's game this season due to the large number of injured players which has made Erik Ten Hag difficult in managing his strategy. Therefore I am quite surprised if you say Erik Ten Hag is not the right coach for the job.
However, sometimes fans still don't want to accept the situation and they immediately express their annoyance by blaming the players or coaches. But that's up to them, which means Erik Ten Hag needs time to bring Manchester back to its glory like during the Ferguson era. Polishing the squad to become stronger definitely takes time and Erik Ten Hag must be patient with all these tough tests.
Manchester United's problem this time is not about strategy but internal problems related to player injuries, Erik Ten Hag did not expect this injury to disrupt his plans because it happens to several players at the same time, the best way to overcome this is to prepare reserve players but Manchester United does not have enough budget for that so Ten Hag only takes advantage of existing players and it is easy to guess, of course it will have an impact on Manchester United's performance for example the loss of consistency in several matches.