@MarjorieZimmermanGinger I personally believe that the key here was Dortmund selling them their key player’s and had Dortmund taken a stand of not selling them then it would have been pretty different for Bayern but then again Dortmund was always interested making money only so not really surprised that they sold to their direct rival. Furthermore other clubs failed because they lacked the winning mentality that Bayern has and until they learn to cultivate it they won’t win the league title.
Bundesliga belongs to Bayern Munich because they've proven beyond doubts about their stand over the decades, we understands how dominated the team is and have inflicted frighten minds on their opponents when they clash. Borussia Dortmund would have been in that position but the team's board is all about making hugh profits from the sales of talented players in the club. Having no stands to fight with the Bavarians for the title because there's absolutely no current players left to fight, all have been sold to elite teams, I think is high time they start using these brilliant players to fight for Bundesliga title.
This is a case that usually happens and Dortmund has no regrets at all for this cases, so this makes Dortmund have a very good ability to produce players with high potential but in the end only to be sold. Meanwhile, the reality is that Dortmund has a large and good fan base but yes, somehow Dortmund fans don't seem to have a problem with the way Dortmund builds its team and squad in that way. I'm sure, if for example another big team always sells potential players, of course there will be protests by fans, but for Dortmund fans it doesn't seem like that will happen.