Hiring Tuchel and replacing him with another coach is the best choice, but Munich management must also be careful in choosing a coach so that this bad thing doesn't happen again because if that happens again, Bayern Munich reputation will definitely decline a little and I'm sure Munich can get the same coach back, right because this is one of the big teams that always makes wise decisions for the sake of a better team future.
I think choosing a coach is a challenge for club management. A club as big as Munich will not choose just any coach. Of course they will choose a reputable coach. But the problem is how to find a coach who can adapt to the team's playing style? I mean of course a great coach will be able to adapt but hiring a new coach means there will be agreements such as spending on players who are the coach's targets. The new coach also needs to adapt to the players so I think it will be difficult to expect the target to become champions in the first season. Unless you coach PSG in Ligue 1 because no other team is as dominant as PSG.