Bayern's style of play under Flick is very specific. Muller is key to that, and no other player can play his role. Then it also needs two pacy, dribblers as wingers.
No position left for Coutinho, the style itself is not designed to have such a type of player.
Then, even if not 1st choice, he was not underwhelming. Flick subbed him on even in CL knockouts and he was always decent.
Then, I don't agree at all with the interpretation that his form 'dipped' suddenly around the summer of 2018.
This is actually a narrative (the narrative of Coutinho suddenly and inexplicably becoming shit after being the best player of a top team for 4 years).
You indicating that I am trying to pull up some narrative. Actually the opposite, I am arguing against simplistic narratives such as the above.
Ah, so it's Flick's specific style. Makes sense. Is that why Coutinho was also shit under Kovac? Lmao