Thomas Tuchel tried his best for Bayern Munich and did well for the club by winning the championship in a short time as a coach. The very time he became coach for Bayern Munich is a difficult time that some coaches won't be able to achieve success but with all difficulties he still ended with a good result. If Bayern Munich didnt end up winning Bundesliga I won't have blamed Tuchel because it is not his fault.
With such
short amount of time it is tough for any manager and Tuchel still managed Bayern better anyway. Well to be honest he was lucky but I think even if the result would have gone the other way, they wouldn't have put blame on Tuchel. The situation at Bayern wasn't great to begin with when he arrived and Bayern had some tough fixtures with CL games as well so it was tough for Tuchel especially coming after a break of nearly 6 months.