The reason why Bayern Munich hired Vincent Kompany was because they he was the only one that accepted to coach Bayern Munich after the coaches that the management contacted did not accept to coach the club. Kompany is not a good with high coaching skill and he has not coached a big club.
It will be a big challenge for him coaching Bayern Munich and putting them back to their place in Bundesliga. However, if the players work with him he might be able to manage the club and come up with good results but it might not be next season because he needs time to succeed.
Challenges are always there for big clubs, although some overcome them and some have completely succumbed to them. Bayern Munich is elite team and they can do more better without a coach, ofcourse we've watch them perform in stellar display. Vincent Kompany is mediocre but it's understandable because he's improving. NBayern Munich new coach, Vincent Kompany is an amazing person and will do everything within his reach.