Thomas Tuchel will build the Bayern Munich team for a better season of course and we will see Thomas Tuchel's real performance, this season Thomas Tuchel has been considered a failure to handle Bayern even though this team won the Bundesliga but overall after Thomas Tuchel handled this team it did not develop quite the opposite, maybe It's because of time, but if Thomas Tuchel starts this season and builds the team he wants then there's no excuse for him if Bayern can't get back to their best.
I would not consider Thomas Tuchel to be a coach who failed at Bayern Munich at the moment, because apart from the problem of a very short time for Thomas Tuchel in terms of handling Bayern Munich this season, Thomas Tuchel also still needs some new strategies to be brought into the team that at the moment basically it is very possible next season so that the assessment of Thomas Tuchel's failure or success at Bayern Munich is when next season is finished, not this season.
however for now it's just a warm up and indeed to say he failed just because he became a substitute coach and several times surprised because the adaptation has not gone according to plan this can not be fully justified.
Now it's a new season, we still don't know and if indeed the performance doesn't match expectations it can be said to be a failure, but with the current preparations, of course something like this is still uncertain.