The current Leverkusen team is quite strong, so Ten Hag should definitely perform well with this team. If Ten Hag is not able to perform well at the end of the season with this team, then it must be assumed that the team's performance has been so bad only because of the manager's incompetence. Winning the league title by defeating Bayern Munich in the German league was quite challenging for Leverkusen, and Leverkusen showed that. If Leverkusen can win the league title again under Ten Hag, then the management will plan for him in the long term, but if the results are much worse than before, then he may not be seen serving as Leverkusen for long. Anyway, everything depends on the skills and strategies of this manager, if he adopts the right strategy and if the players can play on the field according to that strategy, then good performance is not possible.
They are good compare to where he is coming from, there should be any excuse for him nit to be more strong with such already made team that he met in good shape, Eric Ten Hag doesn't possess the character of listening to the opinion of other even when he is making mistakes, this is one of the major cause of his managerial lapses, I can forget when Ronaldo came to Manchester I think is the second time, Ronaldo wanted to help just as a player not even that he want to the job of Hag although I don't if he saw it as an insult and I believe that was one of the reasons why Ronaldo left that club, as soccer enthusiast we are, we know who Ronaldo is and what he can do, at his level of experience, he might have influenced on his teams mate because of his name but I believe that it is for good purpose but Eric Ten felt intimidated, where did it end then, Leverkusen is in their peak although they can be annoying sometimes but Hag needs to do his work properly this time, if not he may be disgraced out again which we don't pray for that to take place.