A team will be stronger if the team is filled with the best players and also trained by the best coach who has more useful tactics for the team. Because when a team that cannot develop well in a certain season, while the players are also not too bad, then the thing that must be seen is the coach. So we can conclude that Kompany still has a pretty good way of coaching so far, it's just that in the previous season he was not in a more appropriate team, namely Burnley so what is seen now when he has coached Bayern Munich is certainly very different from when he coached Burnley.
That has not been proven 100% because the previous season Bayern Munich was also filled with quality players but they failed in the Bundesliga and the coach also determines the direction of a team to be better to achieve the desired title. The match against Leverkusen is a little picture that can be seen where Kompany managed to do his job well even though the match ended in a draw. The reason is because Leverkusen is still coached by the same person so they can be much more solid, while Bayern Munich is coached by a new coach so that in a crucial match like that they have not fully adapted well.
Kompany can be a great coach at Bayern Munich as long as he can see opportunities like other coaches because now he is in a team that has quality players so it is not difficult for him to develop the potential of the existing players. It is just a matter of how he can find the right strategy and the quality of the players he has can be developed through the methods he has.