Dortmund fans was and will always large and very loyal to the team even they are playing not so good.
This will be not changing , for sure they are frustrated when they dont win and making good games.
But i guess that Dortmund will be playing in the next Weeks better and better.
Even though their opponents are not playing well, I don't think Dortmund will be able to perform much better in their upcoming match against Freiburg. If the club continues to sell great players without replacing them with anyone who is better, their performance will eventually get worse throughout the season, and Dortmund fans will become upset with the club.
Indeed, currently Dortmund has loyal fans who always support it in any situation, but it cannot be guaranteed that Dortmund fans will one day leave if the club does not make significant developments. And as we know, Dortmund currently prefers to sell its best players only for its financial needs. However, I still hope that Dortmund this season will have good players again and not sell them and can improve the quality of their team so they don't lose the fans who support them at the moment.
After selling Haaland last season, Dortmund managed to perform well. This was due to the consistent performance of another star player, Bellingham. They sold Bellingham this season. But now their performance is quite weak. Haller and Karim Adeyemi have been key players in Dortmund's attack this season. But the performance of these two players is still quite weak. If the performance of these two players does not improve, Dortmund's performance will not be stable this season. Dortmund added Haller for 31 million and Adeyemi for 30 million. But they are not performing well as expected but Donyell Malen's performance is slightly better this season.