In my opinion, Kompany has done something extraordinary in his first season as Bayern Munich coach, currently they are at the top of the Bundesliga standings with a 6-point advantage over Leverkusen, he also managed to lead Munich to qualify for the UCL quarter-finals.
Although the chances of winning the UCL Trophy are very small, in the hunt for the Bundesliga Trophy, they are at the forefront. Now all that remains is to maintain the points advantage over Leverkusen to win their first trophy as a coach.
It seems to me that Kompany hasn't had much of an impact on Bayern, he certainly brought them out of their crisis but they still have bad games. In addition, Kompany has no experience in the Champions League, and this is evident in some of their games, and in the Bude Liga they allowed Bayer to get within 6 points of them, it's not close yet, but it still leaves the possibility for Bayer to get closer.
Kompany has done a lot in working on the team for them to be in the position where they're in both Bundesliga and UCL. However, Kompany wasn't brought to win UCL, because the management brought him to revive the club so that they can take over the Bundesliga title and continue to dominate it. Everything will be put in place gradually. At least, let's appreciate the good work of Kompany.