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.
Bundesliga title was won by Bayer Leverkusen because Bayern Munich wad not in form previous season. The Bavarians are here to stationed winning and we know it's up and running. Bayern Munich new coach will do better, I know this actual fact for sure. Vincent Kompany is classified mediocre because Bayern Munich happens to be the first top flight club to manage as coach and we know what's capable of, he will put in enough work for the purpose to succeed in his first season.
Many players from Bayern Munich were injured and left to move to other teams. So Bayer Leverkusen saw this opportunity well. If Bayern Munich does not immediately improve the strategy they use and look for new players, there is a possibility that Bayer Leverkusen will win again in the coming season. The coach from Bayer Leverkusen is still the same so the chances of winning will be very high. It would be best for Bayern Munich not to underestimate this and think that Bayern Munich is still the best, we know that the winning rotation has started to turn, Bayern Munich cannot maintain the winning streak they obtained several seasons ago, this should be an important consideration for Bayern Munich to improve their performance and prepare their strength for next season.