#2 Arrogant administration
The circumstances of Gotze's departure to Bayern best illustrate why the Bayern Munich administration is widely hated. Announced 36 hours prior to Borussia's Champions League clash with Real Madrid, it meant the whole team's morale was affected going into such a crucial fixture.
In fact, Borussia Dortmund confirmed that they themselves did not know about the move – posting on their Facebook page, "Mario Gotze's agent Volker Struth told us a few days ago that the player wishes to make use of his release clause and on July 1, 2013 move to Bayern Munich." While Dortmund CEO Hans-Joachim Watzke was quick to emphasise that Gotze and his agent had behaved within the terms of the contract, it was clear that the whole affair reeked of blatant disrespect.
Then there is the derogatory tweet mocking Arsenal post the 5-1 victory ("same again next year?") – and in case you choose to take that in the 'right' sense, consider this. Bayern Munich drew Werder Bremen for the DFB Pokal 2016 semi-finals, and their official account tweeted a dismissive Beyonce GIF suggesting a lack of respect. After being widely criticised for the perceived arrogant gesture, Bayern had to apologise and explain themselves.