I'm just looking at Bayern Leverkusen in a certain way especially after the departure of Xabi Alonso and some key players in the squad who at least I would have thought they stood a chance to give some certain level of resistance to Bayern Munich this season. With Ten Hang I really don't see that, as for Dortmund, those guys can never be relied on because they disappoint when it matters most.
The Germany league is not for the weak, only the strong do survives. Borrusia Dortmund have been dormant for several season, they involved themselves with the business of serving important goals like the triggering of the sell clause and buy clause of players in the transfer window.
The German Bundesliga isn't as tough and competitive as the Premier League, so I disagree with you that the German Bundesliga League is not for the weak. Borussia Dortmund dominated the German Bundesliga league for two seasons, and they won the German Bundesliga title back-to-back, and we thought Borussia Dortmund would rival Bayern Munich for the Bundesliga title, but since Borussia Dortmund prioritised selling their players for money, Borussia Dortmund's performance declined, and they couldn't live up to the expectations to rival Bayern Munich for the Bundesliga title.