The statistics are just there: statistically he is the worst Bayern coach in the last 10 years. Its just a fact.
Dont even mention CL, bc if u only look at CL, even Potter seems like a good coach. 6 games - 5 wins - 11:2 goals lol
The thing is: sacking Potter is very risky from a financial point of view. We risk breaking some financial regulations, FFP, PL and so on. And it means we couldnt really strenghten the squad in the summer. So we should be really sure about the next manager. Just sacking Potter for the sake of sacking is not the best option given the financial problems we will get. We must be sure the next manager wont have the same problems as Potter, Nagelsmann is very expensive as well, so paying him off too after 1 year might actually destroy this club.