Indeed it was the wrong decision to appoint Pirlo as coach because it was too early Juventus believed in Pirlo who did not know experience in handling big teams, so this was a lot of criticism from fans because they did not believe in bringing Juventus to bring trophies and it was indeed proven that Juventus were worse in his hands .
Many have missed the UCL trophy and even PSG's ambition has become the main target in the UCL this season, but at least it is in Allegri's hands that Juve can compete again in the UCL this season and bring the Italian league trophy after Inter threw out Lukaku's core player. easy land to keep chasing good points.
I guess not like they had too many options. Think about it this way, you either get an established coach known for mediocre play, or you get Pirlo which was an unknown when he got here and hope for him to turn into a Zidane type of manager. Zidane had basically zero experience as well, he was raised from the ranks and became their best ever manager, won 3 UCL in a row, how many TEAMS did that let alone managers.
This is why I understand the logic of Pirlo, of course not everyone will be like Zidane and he proved to be not like him as well, but the risk taken was a calculated and good one because the only managers they could convince were managers that were mid level and not a huge name, not like they were getting Klopp or Pep but decided on Pirlo type of deal, that never happened. I would say that Juventus really needs more depth, and a manager like Bielsa that would accept that challenge, it would really help them a lot.