Dortmund and other teams can really harm others as well - they are just not as consistent as the Bayern team is. And never seem to really put all in - atleast not all. Im mean Müller was still pushing everybody after the 7:0 to still keep on pushing and pressing. And - in the last two seasons the other teams had their chances but blew them. Yes, it is difficult against a team with such a mentality - when they feel well and the manager is the right one. Don't forget that Bayern needed 3 years and some months until they found another manager that matched to the group Pep left - interrupted by some months in which Jupp overtook.
Even if we won titles in the last seasons with Ancelotti and Kovac - it did not feel the same as you saw that not everything was right.
You often have this working mentality and togetherness with underdogs - the BVB in 10/11 had it, too - than they beat the team with better individual quality. To have the same working mentality and togetherness in top teams where even the "stars" or especially them put in so much work is really rare.
Yes, Bayern has more money - but what I hate is when people do not appreciate that the team works their ass off and does not just relax on their talent and success. Especially your team with the success of the last seasons should know that! I follow the team since the 70s. Most seasons the team individually was better than the others - but the qualities I see the recent years I never saw. That team in the 70s (I just conciously followed them at the end of that decade as I was to young before) got lazy after their European win and 3 Championships. They just turned up in the European Cup matches but were only midtable in the league.