Dortmund just get closer to Bayern Munich before dropping at some point and letting them advance alone. This season was an epic one since Dortmund gave literally the title to Bayern Munich at the very end after being in advance..
The other seasons weren't different with sometimes Bayern being dominating and sometimes close to the others. Even Leipzig was fluctuating badly. Schalke were runners-up many times in the past and now they are nowhere in 1.Bundesliga..
Yes, the ability of Bayern Munich, which is better than other teams in the Bundesliga, has become a weapon for them to dominate the Bundesliga. I see that ability actually exists in Borussia dortmund, but for some reason they can't use it properly and instead it's like letting Bayern Munich go alone. This season was a very painful season for Borussia Dortmund, because they had to fail with different goal productivity.
We have two completely different mind-sets in these two clubs managements with Bayern Munich is looking for the trophies and Borussia Dortmund is looking for the good profit through selling their top players which is clearly giving all how they work with both are having enough sources which can help them for doing good things, but Dortmund management never go for the trophies which is surely allowed Bayern Munich for dominating here but as things are going specially we have some decline in Bayern Munich and good fighting spirit in Union Berlin and RB Leipzig hopefully things will be positive and competitive because if we have better performance from these clubs then surely we will have good improvement at the top level and now Bayer Leverkusen is also doing amazing stuff for the staying at the top level which is also positive thing for the good fight at the top.