There are several reasons why Bayern Munich cannot be as optimal this season. Bayern Munich is not just Harry Kane, it includes the entire club from all the players involved, skilled football managers and other influences. So it's not just Kane's responsibility and responsibility for being the star of Bayern Munich. Moreover, even though they are playing very well, this season is very different, because Leverkusen is truly beyond expectations.
I believe anyone who says Kane is the reason Bayern failed is just memeing, to be honest. If they truly believe he brings bad luck, then that's just naive. You can play around connecting dots here and there but at the end of the day, you can't explain to your stakeholders that the reason why your club doesn't win anything is because some players bring bad luck. Might as well throw some darts when you want to decide which players you should buy this season. That being said, some clubs do make poor decisions here and there whether they are in the Bundesliga or not.
Indeed, they are just memeing. And indeed, when their idol club loses, the fans will always look for a scapegoat to blame 100%. And this time, Kane brought bad luck. Shit. In fact, Tuchel should be more responsible for Bayern Munich's condition this time. We'll see how next season goes, because Bayern Munich will have their new coach. However, several candidates for Tuchel's replacement coach are still being debated, because some of the choices are not that good. In fact, Vincent Kompany is the most discussed candidate. But, didn't he really fail at Burnely? Burnley itself is even in the relegation zone, but what Vincent Kompany considers to be the most appropriate.
So yes, one of Leverkusen's keys is Xabi, if he is still there, and they are able to buy several key top players to further strengthen the team, Leverkusen will be much better than it should be. After all, next season they will enter the Champions League, so they also have to be more prepared to meet other strong clubs, more than the Bundesliga and Europa Legaue.