Bellingham was Borussia Dortmund's biggest weapon. The same situation was true for Haaland last year. The team got a little worse after Haaland left. After Bellingham left, Dortmund got worse. Dortmund is a team that is adept at recruiting young and talented players. They may be bad this year, but they can make up for that deficiency soon. The observer team is very good.
Dortmund would find a way to improve their results sooner or later. I don't see them making a great start mostly already. This kind of a start isn't something new for Dortmund. They still manage to be one of the top teams in the league no matter what. Bellingham's departure will of course affect them negatively.
But there are new players added to the squad who can also make a decent level of contribution. Honestly I don't think they can be in the title race until the last moments this time but they can at least maintain their existence in top four.
Yes indeed, of course there is nothing to worry about the bad conditions experienced by Dortmund because after all, over time Dortmund will also recover in its own way. Although indeed, when players who have great talent leave, of course there will be a bad impact that occurs also on Dortmund performance. But from all that has happened, again and again Dortmund always manages to have new talents in its squad and great again, Dortmund will always be willing to sell great players in its squad.