I agree that he needs to go. The minimum requirement in Serie A is to at least be in contention for the Scudetto. We were not. We also went out early in the Champions League. The Coppa Italia defeat and Supercoppa defeat were disappointing, but they are the 3rd and 4th competitions so I am not as disappointed with them.
Because you're presuming that the main issue with the team is the manager. It hasn't been. To use your analogy, if you change girlfriend after girlfriend, claiming all the time that each is toxic only to get in another similarly bad relationship, maybe it isn't the girlfriend, but rather, you. The issue with this side has been bad personnel for a long time. Allegri, Sarri, Pirlo have their issues, but it's hard to judge fairly when we give them shit to work with. In Allegri's case, we know he knows how to win. We've seen him do it. I agree with the last part. If you provide Allegri with a nice midfielder and attacker in the summer, and strengthen the defense, and he still isn't getting results, his position should be under consideration. Hopefully Arrivabene makes some good signings.
Max Tenure at Juve ended tragically and from what I’ve seen this year it’s enough for me to draw the conclusion he doesn’t have the same magic. He had some great players to work with but he fails to make the current squad better. It’s hard for me to say but he is at this stage no better than Pirlo.