Dortmund can produce talented players. But naturally talented players will not want to stay with Dortmund. Because this team has no hope of winning the title. They do not form a squad fit to win the title. Lewandowski won several Bundesliga titles with Bayern Munich, La Liga with Barcelona. Haaland won the Champions League and Premier League titles in his first season with Manchester City. Had they stayed with Dortmund, they would never have won so many titles. This is why Dortmund cannot keep talented players with their squad even if they want to. So almost every season they sell the best player in the squad for a smart price. They are financially very profitable.
Dortmund doesn't really want to win a title either in the Bundesliga or in the Champions League because Dortmund's goal is only to train its talented players so they can sell at high prices to elite European clubs. If Dortmund wants to win the title, it might happen because Dortmund has talented players in it, so if they are able to compete strongly and pursue their ambition to win the title, Dortmund will definitely be Bayern Munich's strongest rival.
Unfortunately, Dortmund only thinks about business without thinking about the careers of its players so they can win trophies, that's why many Dortmund players don't want to stay at Dortmund for long because Every player definitely wants the title of champion at the club he plays.
Agree with this and there is a lot of truth in what Dortmund has been doing so far regarding the main goal of being able to achieve massive financial profits by selling the best players they can produce but actually Dortmund is team that is strong enough for the Bundesliga and they are very often being runners-up or in the top three so if they really want to focus on the title then it is not that difficult for Dortmund to achieve it.
If Dortmund leaders and management can be replaced perhaps there will be big change which was initially aimed at being business to make profit becoming team that really competes to become champion.
Mistakes like this are the result of team management who do not really care about winning titles and in the future I am sure that Dortmund can change.
Dortmund can become team that its fans are truly proud of in every league they play.