Flick definitely needs to adjust some parts of his game but he isn't the main problem.
The squad is poor and that lies on Laporta and Deco.
@khaled_a_d said it right, the current squad did overachieve last year because of Flick but there was always going to be a time when the deficiencies were going to catch up to him if they weren't addressed.
Defence was our weakest line last year and this year it only got worse.
It needed to be addressed last summer. It was/is only a matter of time until Flick wasn't going to be able to squeeze anymore juice out of the lemon lol.
Wouldn't be surprised at all if this season is a failure and he walks at the end of it.