Dortmund's handing over the title to Bayern Munich shockingly on the final match week was unbelievable to me as well. However I don't think Dortmund board are mad at this situation too much. I mean Terzic wouldn't get sacked for this. Because Dortmund's main target in this season was never to win the Bundesliga title. Maybe they got too close to doing it thanks to Bayern Munich's making many mistakes. But this was going to be extra effort by Dortmund if they made it.
Getting close and not winning it is bad. Bayern were not as strong as they usually are this season, Dortmund had a really good chance to win it, but failed to. The coach of Dortmund did well but it would have been better. Next season he should try better. Bayern won the title, but the management still fired some people from the club, shows how unhappy they were and have already started making sure that next season is better. Maybe they will win next Bundesliga again.