you’ll are forgetting one very important point, that Bayern steals their local competitors player’s season after season and thus they make their competitors weaker. Furthermore no where in other leagues do local clubs sell to their biggest competitor (year after year), and till the clubs in Bundesliga continue to do business with them there’s no way they’ll be able to end Bayern dominance over winning the title.
If we look at the last few years the Bundesliga is not a competitive competition, we can see how Bayern Munich, which does have financial strength, always tries to weaken their competitors by buying core players from the rival club, although it is a natural thing but it shows if the power of money is an important factor for a club that wants to win, and for me personally it is not surprising that Bayern Munich won the 2019/20 season and maybe even Bayern Munich will continue to dominate the Bundesliga in the next few seasons.
I am pretty sure they will dominate the league for a good while more. New coach, new motivation for everybody and Sancho confirmed to go to Manchester United I think? Dortmund should make sure that they are not going to lose another good one. They can't let go Haaland this season, but what would they do if a club offers $150 million? Tough, Dortmund is financially healthy, but not that healthy to not even consider selling him.
However, there is no denying that the club's structure works like clockwork and the money earned really brings even more money. Another question is that when you operate with large amounts, the price of mistakes increases and no club is immune from this, which we are seeing at the moment, including the example of Barcelona. It's just that the situation with the pandemic played the role of a perfect storm, which exposed the problems of those clubs that drove them deep away from the eyes of outsiders at normal times.