The season hasn't started yet and he may have started making statements to the press early. I hope it's not the same as when he was at Manchester United, where he started with losses in friendlies and then came his interviews in which he complained about players and the relationship with the players became terrible, then he made terrible signings.
Now at Leverkusen, he already had a defeat in which he conceded 5 goals in the friendly match. In 5 days, he will have another friendly match against Bochum, who were recently relegated from the Bundesliga. If he loses, it will be terrible for him.
I think it's not the story for now, it's been a long time since the fans and the viewers are very expressive about the insecurities regarding the Eric Ten Hag performance. Because Bayern leverkusen is a good team and they deserve a fully skilled coach but the coach they hire is under criticism due to his bad performance which is an alarming situation for the viewers. It's not necessary that the same results will happen again but perceptions have not changed until the results do not get better. He should work hard not only for the team but for himself and for the fans to restore his good image in their minds. But, if he is not able to deliver the best i think this will be very dangerous for his career as the chance becomes he does not get any opportunity to prove himself again.