Ten Hag is a hard worker, but his hard work has not fully proven that he is able to improve the quality of Manchester United. The performance of the team he coached was very far from being as stable as said, so they were very inconsistent for a long time and this was an unresolved problem. It's difficult to restore Manchester United's performance to being the best team like in the past, so I think this is no longer their era.
Whoever the coach is, Manchester United won't change much in my opinion. You can look at their list of coaches so far and find out who has helped Manchester United win the title the most, I think it's none other than Sir Alex.
Since Sir Alex Ferguson's retirement as manager of Manchester United in 2013, the team's performances have not been as successful as they were during his tenure. since his departure, the club has struggled to find consistent success and has failed to maintain its former dominance in the title race.
Manchester United's current situation is deplorable. Even though ManU's squad has suffered a massive erosion, I think the main problem is the manager. Erik ten Hag is a manager who has never been able to settle and press the opposition. I find it hard to understand his game plan, maybe he can create a very good transition team, but it's definitely not for ManU. When you think of ManU, the system of play that Sir Alex Ferguson has created over the years makes us not accept the current situation. Unless ManU bring in someone with a big vision and the mentality of a big team manager, it is impossible to recover.