Tuchel is a very good Coach and Trainer for sure and Bayern Munich wanted him some years ago as he was in still in Chelsea.
I guess it is and was the whole situation inside the Club of Bayern Munich that has made some problems to the Team.
There was a lot of heat in the Club with the managment and all how the things where handled.
If all calmed down and the new season will be started we can say more about the future of Bayern Munich.
I don't doubt Tuchel's credibility with Bayern Munich in the Bundesliga. well, this season is over. now, Tuchel only needs to prepare what he will implement, including bringing in the players his team needs. for sure, Tuchel has time to achieve chemistry with his team. at least, the main capital for Tuchel is mutual trust between players and coaches. once it is well established, they are able to adapt well. and what is certain, Bayern will come back strong in the next season. it is even probable that the competition in the next season will not be like this season. maybe, Bayern will move smoothly away from the teams that are under it. but on condition, Tuchel must bring in players according to the team's needs, namely pure strikers. if they get it, it doesn't look like the Bundesliga will be a big problem for Tuchel.
Well, the problem is in the Champions League. currently there are several new clubs ready to fight to beat each other. in theory, Tuchel also has a target in the competition. but before that, let's see which players Tuchel will bring to the Allianz Arena.