Dortmund just doesn't consistently get full points in every match they play, I don't think they are completely bad this season in the Bundesliga. We can see how their journey has been in seven weeks, it is proven that even though it is less than satisfactory, Dortmund have not been defeated so far. In this case, Dortmund is the same as two other teams, namely Laverkusen and Bayern Munchen.
Maybe when compared to last season there is a slight difference in Dortmund performance, it's natural because they are released a star player like Jude Bellingham, it's still good that they haven't been defeated. I think when the transfer window opens, Dortmund will bring Sancho home from Man United but this is still speculation.
Bundesliga is tough to deal with, because with the presence of Bayern Munich, there's a long fight to be fought because this particular elite team doesn't give up so easily. However there are other competitive contenders for Bundesliga in the past years, we have e Dortmund. Borrusia Dortmund keep playing good football but not competing for major league titles is basically what's making the club value below their standard. They have the talented players but already sold them out for significant values in the transfer window, they will repeating these actions because that's the only stream to generate monetary revenue for the team.