There is no evidence yet so it is natural that many people doubt Kompany, but Alonso has proven it last season so I am sure that next season Alonso will be able to make Leverkusen better than what he gave last season.
But sorry, guys, that doesn't mean I will discourage you from believing in Xabi and Leverkusen, but we have to look a little deeper into the situation that Leverkusen will face in the next season, who will appear in the UCL and the match schedule will be busier considering that there are additional participants in the UCL which made Leverkusen have to use more energy.
On the one hand, Xabi has no experience in the UCL during his time as coach, even though he can perform very impressively in the European Leagues, but the problem is that the competition in the UCL is very different and there are more experienced big teams that Leverkusen has to face.
Rotating Leverkusen players to remain consistent in several competitions will be a very tough challenge and I am sure that in the Bundesliga Leverkusen will experience a slight decline in performance and will not be the same as last season.
For Kompany, currently many people are looking forward to his work, there is only speculation that Kompany can make Bayern better next season, but what must also be remembered is that during Kompany's coaching career, none of them have been successful, so I think next season Bayern will make Kompany the coach. is a big gamble.
TBH, I actually slightly disagree with Kompany arrival because I also doubt the coach's achievements, but after I said the facts I said before, I thought that Kompany had the opportunity to take advantage of the opportunity given by Leverkusen who will appear in the UCL and Kompany could making it easier for Munich to win the Bundesliga title again.
Let's give Kompany a chance to prove he can improve Munich.