Yes, Erik Ten Hag does not look too bad but his recent experience has really put his reputation in doubt.
We don't know what will happen at the moment and many have doubted the coach and for me it is right to be doubted because the Bayer squad no longer has a reliable player after Florian Wirtz left the team.
This is not an easy job for ETH, I am sure there will be a bad performance at the start of the season.
Most people have assumed that, but we also need to see how Erik Ten Hag makes his mainstay tactics in Leverkusen next season because the Bundesliga is very different from the Premier League so Ten Hag might be able to give his best in the Bundesliga with Leverkusen although I personally am not so sure that Ten Hag will be able to change the Leverkusen team into a team that dominates the Bundesliga next season. Moreover, there is one of the best players from the team who has moved to another team, namely Florian Wirtz.
Wirtz was the team's biggest goal weapon, but his departure and Leverkusen's different squad structure from last year will make things difficult this year. Still, we can say that the Bundesliga is an easier league than the Premier League. New coach Ten Hag had a very good career in Holland. Maybe they can make a similar preparation and prevent Leverkusen and Bayern Munich from winning the championship. Of course, time will tell.