Firing Nagelsmann was the worst decision Bayern could have made. I still don't understand why they made that decision. Nagelsmann was doing well in both the league and the UCL, and while things were going in his favor, Bayern suddenly fired him. Later, Tuchel was fired and an offer was made to Nagelsmann again, of course, the honorable man rejected this offer. Kompany is a coach they can easily waste in case of failure. So they went to try it. Let's see if the decisions are right or wrong.
When Bayern Munich sacked Julian Nagelsmann, he wasn't performing bad for the club but the club in their statement that made them part ways with the German manager suggested that they weren't too convinced with his performances. They went on to sign Thomas Tuchel who they felt had a better managerial experience than Nagelsmann but unfortunately for Bayern Munich, Tuchel's reign as the club never matched that of Nagelsmann in terms of winnings. Bayern Munich needed their rivals Borussia Dortmund to lose their last league game of last two seasons while they win theirs to be crowned German champions but ran out of luck in the just concluded season as Leverkusen won the league.
The sack of Julian Nagelsmann I think was a poor decision and I hope their new manager succeeds so they don't continue to live in regret