If a team dominates every single season and if it continues then the league will definitely lose popularity because if there is no competition in the league then people will never follow the league. Bayan Munich has won enough titles in the local league so if a new team enters the competition now it will definitely be good news for the German league as there are other teams competing hard against strong teams including Bayan Munich.
even though initially, they were as usual, well leading the league at that time, but indeed, because they had often been league leaders and maybe they thought that the domestic league had no threat to them, they were not that serious about it, and only focused on the league big like UCL. But in the end, they were too late when they realized that their position was threatened by the existence of another team, not Dormtund, but actually Leverkusne, who was actually very consistent in always winning in every match.
In fact, while Bayern Munich may have hoped that they could catch up with Leverkusen again, they failed. because until the end, Leverkusen never lost, only drew and kept winning. So when Bayern Munich actually experienced defeat several times, this meant they were increasingly pushed out of first place. So, it is true that Leverkusen can be so extraordinary in maintaining its consistency from the start and never losing, this is what makes this club so extraordinary. And coincidentally, their focus was only on domestic leagues, such as the Bundesliga and DFB Pokal at that time.