I agree with you that it is like Bayern Munich is starting all over again since a new coach was brought to take over from Tuchel. If it was Tuchel, I will say that by now he has understood the players and their capabilities on how to use and mange them to bring good results for the club, because I will say that he was learning last season.
Kompany is on a new club which he is meeting these players for the first time to coach them and he will need time to learn about these players and their strengths to know how he can fit them into his game tactics, which will not be something easy. This is why I still think that next season will not be a victorious season for Bayern Munich because the other clubs are also ready to win the league.
I hope he ( Vincent Kompany ) is trying to bring in players that would fit into the long term plans of the club not just for his own time as coach, yeah?

There's no way the likes of Joshua Kimmich and Thomas Muller would be staying if Thomas Tuchel stayed. I'm not saying he is a bad coach, but his tactics weren't in alignment with the way his squad and the players played. And at the same time, had a bad relationship with strong minds in the dressing room.
It was the right call to part ways with Thomas Tuchel. Though, Bayern Leverkusen did very well at a top top level.
I want to see a game between Bayern Leverkusen and Bayern Munich and who classes the other when it comes to tactical intelligence. I'm still more of a Xabi Alonso fan even though I have something for Bayern Munich as well. I never saw all of his games when he was manager for Burnley.
T's reported he did brilliantly well as a manager for Burnley.