most people also complaining why Bayern management suddently sacked Nagelsmann without any spesific reasons
The reason for Julian Nagelsmann's dismissal is very clear, if you look at various well-known sports media, the reason Bayern Munich sacked Nagelsmann was due to a significant decrease in performance, yes, even though Nagelsmann has so far managed to keep Bayern Munich in the UCL, that's just not enough for Bayern Munchen. FYI, they have won the Bundesliga title since the last 10 seasons, if they don't manage to get the Bundesliga title this season, it will be a big surprise for people.
Agreed, and maybe I'm one of the people who likes Bayern Munich's decision to sack Nagelsmann and replace him with Tuchel. I think it's also very interesting, because Tuchel was also sacked suddenly by Chelsea but finally, Tuchel was appointed coach of Bayern Munich too at least suddenly or maybe for a short time.
So yes, with this change of coach, of course the competition in the hunt for the Bundesliga title between Bayern Munich and Dortmund will become more interesting, because Tuchel is also a former Dortmund coach.
Maybe this will also be the second chance for Tuchel to surprise, having previously been able to quickly improve Chelsea's quality by winning a title. So I think, with Bayern Munich it looks like Tuchel has a big chance to repeat that success and maybe, with Tuchel it looks like Bayern Munich will have the chance to win the Bundesliga title and also the Champions League.