If Dortmund can secure three points with their opponent today, then their position in the point table will improve a lot. Moreover, since today's match is against Bochum, a team in the relegation zone, it is expected that this match may be the most likely for Dortmund to win.
Moreover, the betting odds also indicate a win in their favor, but this match is being very aggressive between the two teams at the moment, but if they can attack strongly, Dortmund will win.

Dortmund is not a weak team. We have seen great performances from Dortmund in the Champions League. But I am not sure why this team is not able to do well in the Bundesliga. Does Dortmund have no interest in doing well in the Bundesliga?
Dortmund lost 2-0 in this match against Bochum. Bochum is one of the weak teams in the Bundesliga. The team is in 17th place in the table. And the chances of this team getting out of the relegation zone are also low. Even then, Dortmund lost 2-0 in this match. Dortmund had 70% ball possession. However, the interesting thing is that Bochum managed to make 18 shots despite only 30% ball possession. Although Bochum's victory was completely unexpected, Bochum performed brilliantly in this match.
Losing against a weak team doesn’t mean your performance is very poor but just due to their unluckiness in the game; if not, who would expect Dortmund to lose against such a team? So it is just not a good day for Dortmund; that is why they were not able to win because you also mentioned that in their game possession, Dortmund has 70% while Bochum has 30%. Moreover, even the 2 goals were so quick because it was just a 2-minute interval, so it was somehow difficult for Dortmund to maintain, but it came to see that Dortmund's performance has a default in their defence.