I think Dortmund is making a mistake by letting go of young players. Jude Bellingham and Haaland are the two most obvious examples of this. If these two players had stayed this year, Borussia Dortmund would probably be one of the strongest candidates for the title. However, since they run the team like a company, I think the title is something the management does not care about. It seems like the Borussia Dortmund management is trying to buy players and sell them for more money.
What they are doing is not longer a mistake, it is a deliberate attitude and I think it's the way they plan to be carrying out their operations. Assuming it was a mistake, they would have realized the mistake after selling off a few players and see how great they become especially the goal machine Haaland. After Haaland they have built and sold players that are extremely doing well too. Assuming they are interested to build a squad ready to win trophy, they would have been convincing these players to stay with them and achieve positive results together. The fact still remains that they prefer and Prioritize business over building the team for competition.
Peoples those are well aware about this league and Borussia Dortmund they are also understood about their business model because they are having strategy of bringing young players on low price after development selling them on high price is giving them good profit so they have never been having intention to win title because their business is having better profit for them instead of having from wins of trophies.
We can check how many big names were here at this club and as they are having good performance big clubs are going to give them long contracts, and they are going through without any problem so it's not big deal here at the Borussia Dortmund but now in last season things were not on spot so they are going to improve their squad for the next season because now we are having few good teams for the top spots so they are feeling heat and having some good buying in this transfer window.