Nagelsmann doesn’t need to worry too much yet. Bayern will probably still win the league despite their bad form. There’s only really Dortmund as a proper competitor & they have lots of young players who could choke as the season goes on. Bayern know how to win the big trophies, they have a lot of players with bog experience.
The Bundesliga is the worst league in Europe.
I think that in the last 20 years 90% of wins went to Bayern.
I still don't get why fast there are so much passionate to a league where you can't win.
Bundesliga create all the time many players that will shine / continue shining in the other leagues especially EPL.
There is also some randomness in games there. You never know how a match will end even if the opponent was a big team playing vs a weak one.
The problem with Bundesliga is the teams that fail to compete Bayern, not Bayern itself or any other thing.