Bayern munich has been inconsistent in the bundesliga this season, they are still close to the top of the table and if they beat Hertha Berlin today they will take the first position from Dortmund. The bundesliga is not so competitive, because even if Bayern munich do not play well they can still win the bundesliga title, and if they win it this season, Dortmund should know that they have let their fans down because this season was a good opportunity for them to win the title from Bayern munich after many years of them winning it.
I have always said this about Dortmund. They can never be relied on. Even before their draw to Bochum, I always knew they will slip up and let Bayern take the lead. All Bayern needs to do now is win all their remaining matches and they have won the league.
You said Bayern have been inconsistent in the league this season and that's true, but still Dortmund could not make use of the opportunity. I have been saying this all season long. I am rooting for them but I just find it hard to trust them. They were in a position that all they had to do was win five matches and the league is theirs but they are about to bottle it. Now they will just have to hope Bayern slips up.