If you went back 5 years and said that Eintracht and Bayer were "not easy opponents" for Bayern, you would simply be laughed at. And I agree that these are not easy opponents for the current Bayern, my point is that this is why the intrigue in the Bundesliga is more relevant than ever and Bayern is far from killing it (although at the beginning of the season it seemed otherwise).
True, Bayern has the overwhelming advantage there when you look at all duels win:draw:loss ratio. But some analysis for the time being is appropriate as if you look at the last two games that Bayern played against Leverkusen and Frankfurt, it is still the same as ever. Bayern brutally dominates the game, but they don't score the most important goals and this is something that they have been fighting with for quite a while now.
Bayern had 70% ball possession and 18:3 shots against Leverkusen. Just imagine how bad their conversion rate of chances to goals is and this is their biggest issue. Same thing against Frankfurt, 75% ball possession and 24:6 shots. It is always the same with Bayern in recent weeks.
In some way I find it surprising because they have Kane, Musiala and several other players who are known to be good strikers if they are in good shape, but it is not the case now. Frankfurt has 4 shots on targets and scores 3 goals. It's both a problem in the offense and the defense.
I don't know how valuable Kane is when he scores so many goals against average clubs in normally important games and doesn't score when it's so urgent. But Bayern paid 100 million for him and as far as I know, he receives a salary of 25 million euros. I think that value comes from how important a goal is, not whether you score 3 goals out of 9 goals in a single game.
Leverkusen will have a say this season in the Bundesliga. I love their pace in the game and they have been a bit out of luck in some games. But my feeling is that they will have their winning streak very soon.