Obviously, Tuchel failed in his first season with Bayern Munich, but that doesn't mean he doesn't have the ability to bring Bayern Munich to win the Bundesliga trophy, he has actually succeeded in winning the most prestigious trophy in the Bundesliga with Chelsea.
Last season, Tuchel was hired after Bayern Munich went with a big decision to sack Nagelsman, not to help Bayern Munich to win Bundesliga but to win Champions League or go far in Champions League. He failed with a big task for Champions League and nearly failed in Bundesliga too if Musiala did not score a late goal for Bayern Munich.
Tuchel was very luckily to save his coach position of Bayern Munich after the last season ends.
This season's failure will be the most valuable lesson for him to face the heat of competition next season. He just needs time and support from club management, players and also loyal Bayern Munich supporters. It must be acknowledged that Bayern Munich's downturn this season was when the responsibility of the coach was in his hands, but it would be very unfair if Bayern Munich's failure was considered purely his fault in managing the club.
This season, he fails again in Champions League even Bayern Munich bought Harry Kane for him and worse lost Bundesliga title to Bayer Leverkusen. I feel no reason to sympathize with Tuchel for his failures this season. Believe in him for one more season, I don't know if Bayern Munich will expand their patience and give him one more season to prove his ability.