I don't have Bayern Munich but I think they usually win the league because other teams are not investing well enough and other teams make huge mistakes otherwise Bayern Munich couldn't win this league at all in a normal situation because of having unstable results and unstable situation in their team.
Dortmund could have a much better performance and this way they would not lose this chance for this season in the last minutes.
Strength is also important in this case. Bayern have always been strong with the players they have because they are above the average players at other clubs both individually and as a team.
On the other hand, the real comparison is about finances so that they can continue to make updates in a better direction for their club than other clubs.
But this season, the sale of Lewa has more or less affected Bayern's condition, I think, but it is possible that they can be anticipated again next season if they don't hesitate to look for another potential star as their target.