That's true the last time Dortmund won the Bundesliga was a year ago in 2012 but in fact, Dortmund is not a weak team and they always have a strong player like the last season they had Haaland but the sad thing about Dortmund is they can't keep the player and stay stable for another season to win the title.
For example, we know this season Dortmund had a good performance but they are going to lose the most effective player they have, Jude Bellingham at the end of this season.
That is normal actually. Why would anyone stay when a better club approach the player? It's fair actually and if Dortmund wants the players to continue with them then they have to improve their performance and standards and become a big club like Madrid, PSG, Bayern and City. Dortmund winning this year's Bundesliga (assuming they win and things don't take for turn in the last round of the season) will only set a stepping stone but they have to make a series of these achievements in order to stand where the big clubs stands right now.
For Bellingham it is just wonderful as he is about to win the Bundesliga title with Dortmund and then move to a big club like Madrid.
Since the beginning, Dortmund has never targeted to win a championship trophy, because currently Dortmund is on the right track. automatically, they will not waste the opportunity they have right in front of their eyes. only need one win, Dortmund ensure won the Bundesliga trophy this season. and if Dortmund are able to take advantage of this momentum, it means that Dortmund have broken Bayern Munich's dominance for the past decade. an achievement that really needs to be appreciated, because at the beginning of the season Dortmund's performance had experienced ups and downs.
Well, because Dortmund is not targeting a championship trophy, that's why every player they have coached has a high price, Dortmond will let him go. without exception, several Dortmund players will move soon after this season ends. one of them that has been confirmed is Bellingham who will move at the end of this season to Madrid. maybe, some other players will also follow like for example Youssoufa Moukoko who was linked with several clubs. or, Adeyemi whose performance is starting to look good. in essence, Dortmund would rather be in the business of printing great players and selling them after having a fantastic price.