11 years without a title I would call a big failure than a good competition
In general, Dortmund has actually turned into a trophy-free club - they sometimes win the German Cup, but all their significant successes like the Bundesliga title or some kind of Euro Cup are in the past. Sad situation for a top 2 club in Germany. In every other country, the top 2 (and even the top 3) have done significantly better in the last 10 years.In the bundesliga, only bayern munich is the most consistent in defending the bundesliga title because other teams are not able to do much because the depth of their squad is relatively dominated by ordinary players but in the depth of the bayern munich squad they are able to present many quality players.