Ten Hag deserves a chance, but we realize that Leverkusen fans cannot expect too much.
Despite many doubts, at least the appointment of Ten Hag as the new manager can maintain Leverkusen performance to continue competing at the top of the standings. However, before the season starts, Ten Hag must rebuild the depth of the squad, which of course will affect their journey next season.
He succeeded with Ajax Amsterdam before moving to Manchester United, so at a smaller league than Premier League and work for a smaller club than Manchester United, I think Ten Hag will perform well enough and won't get terrible management for Leverkusen. He has to help Leverkusen going through this summer transfer season as best as possible because it is important part of the club preparation for a next season.
The depth of the squad can be something important for Ten Hag because next season they will play as one of the title contenders and if the current transfer market is not utilized well, it will be difficult to compete with Bayern Munich who are currently growing. For the Champions League, I do not favor Leverkusen next season because there are many things that make them look not so favorites. Ten Hag certainly deserves a chance but don't expect too much in terms of titles because the new manager will definitely need to adjust to the pace of competition in the League.
Bayer Leverkusen and Ten Hag will have to face with a very hard summer transfers season. After the end of Xabi Alonso era and his departure with a destination is Real Madrid, he possibly will try to bring some star players from Leverkusen to Real Madrid. In addition, there are many big clubs in Europe with their scouts have been already followed up many star players in Leverkusen two latest seasons. This summer opens great opportunities for big clubs to convince star players in Leverkusen joining their clubs.
If many star players leave the club, Ten Hag will have a very hard season ahead but Bundesliga is less competitive than Premier League and his job will be less stress than in Manchester United and Premier League.