I'm really fed up with Bayern Munich's buying every one of talented players from Dortmund.

I'm not happy to hear that Bayern Munich could be interested in adding Erling Haaland to their squad in case Lewandowski decides to leave the team because of this. Please, just let these players go to other leagues a little, man. If Haaland is leaving for real this summer, then I would like to watch him in other leagues from now on. The Bundesliga is one of the top European leagues of course but not as big as the English Premier League for example.
Bayern Munich is a club that has strong finances currently in the Bundesliga, and it cannot be denied that as long as Bayern Munich is a club that does have a winning mentality, their desire to continue to be champions forces them to continue to bring in great players to the skuad and natural for bayern munich to buy star players, But in my opinion this fault lies with dortmund themselves who prefer money by selling star players and they don't care even if the money comes from their own rivals, dortmund should be able to choose to keep their stars by putting a high price clause or at least if they want to sell a player, can't they choose to sell him to a club outside the german league?