I wouldnt say the problem is formation related, its different to me - the real problem is:
- he refuses to have more than 2 players who are commited to attack mainly.,
- we sit back all the time,
- there is no plan for pressing, players arent covering the opposition correctly or are too late,
- no automatic movements and setup of passes in the attacking phase.
This all can be covered by having players like Dybala or Pirlo, who have that spark of genius when playmaking, with Locatelli and other shitheads it just doesnt work unless they have acres of space.
Its also a lot easier to setup defensive minded team who only thrives on opposition errors than a team who shines cuz of its qualities and it really seems its the thing he tries to do.