I don't think Dortmund will be a fierce competitor in the Bundesliga title race this season, they have undergone a lot of changes and on the other hand Bundesliga teams like Leverkusen, Leipzig and also Bayern have improved much stronger, it is the opposite of Dortmund so I doubt a little that Dortmund will compete fiercely in the title race especially this season they have a new coach of course every new coach needs to adapt in building a team as well as for Dortmund's new coach this season.
This season Borussia Dortmund has not performed badly. They have won one game and drew one in two games. They are even better than Bayer Leverkusen which has just three points in two games. They have a new coach, Nuri Sahin, who is not new to the Bundesliga, having worked as an assistant coach in Dortmund before he was appointed head coach. Four points from two games is not that bad, and hopefully, they will improve after the international break.
After a winning start and a draw in the Bundesliga, Dortmund’s performance seems fair from my perspective. In their opener game against Frankfurt, luck was on their side towards the end. They had a tough start, but they need to push through these challenges and start securing more victories after international break. As the season goes on, the competition will get tougher, so it's crucial they work through these early struggles under their new coach, Nuri Sahin.