Ten Hag has been given enough time, and if there is no improvement in the club’s performance, then he should just leave, but Manchester United will have a problem getting a quality coach, because I don’t even know the coach that they can get that will be able to improve the club's performance.
Ten Hag does not seem to be able to improve on his character and relationship with the players. He's still disallowing himself to be free enough to accommodate and lead the players to their best performance making it difficult for the club to be consistent enough.
As a manager, you must have the ability to boost the morale of the players at all time to give them the ability and strength to work out their skills on their games. This is the major issue I've seen from Ten Hag. He needs continue to work on his own temperament to achieve more success. It takes humility and self-discipline to become a successful manager.