If they play the match with hard work, they will prove themselves strong and perform well, otherwise the good thoughts they have will turn into bad ones, due to which it may be difficult for this player to be good in his team. They will prove themselves strong due to their hard work and they will also understand that anything can happen in the match, due to which they will have to think about both good and bad results. If they play by keeping their strength from here to their mind, then I also consider their shoes better.
So far Leverkusen have disappointed me, as I said before, if they let themselves be beaten by an under 20 team, and that means they are in a bad way, I personally do not see this team as strong and that is where Ten Hag's work comes in, he has to quickly structure a system equal or similar to Xabi's, he cannot arrive and change everything because that is what happens, they lose by a landslide, he has to use the same strategy and improve Xabi's.
In my opinion, after Bayer Leverkusen lost their best player this season and got a new coach with a poor reputation, I don't think the Bundesliga will be competitive next season.
You don't have to see it that way either, it will be competitive, the Bundeliga doesn't only have Bayern or Leverkusen, I have faith that Dortmund can compete this time, without considering what Leverkusen can do, you have to see it in the best way, until now Leverkusen hasn't done well in the preseason, it's even valid, but if they do the same in the Bundeliga they have to urgently change coach, one player doesn't make the difference, I imagine you're referring to Wirtz, right ? There are always good options to make a good strategy.
If Eric Ten Hag was a good coach I wouldn't bother about any players leaving the team. But this is a man who gambles every game leaving the entire work to the players discretion and when he looses he makes excuses. To me, Bundesliga this season does not concern Bayern Leverkusen in any way. Allowing Xabi Alonso to leave was a big mistake on the management side even though I suspect that Xabi Alonso saw the team collapse and wouldn't want to destroy the reputation he has built for himself; and no one rejects offer from Real Madrid anyway. Loosing by 5 goals to 1 against flamingo was a good indicator of what is to come and that was his first game.
More players might possibly leave by January when they can't cope with his style of play. Anyways, the good thing about him is his trophy mindset, he will always find his way around it and I give it up for him.