I finally figured out what's been going on. The torturous nature of Juventus story and vibe is not a bad fate but a deliberate choice. That is what defines this club's uniqueness and sells their jerseys. That's why the management work around the clock to do everything possible to prevent the Champions League triumph.
Here's what likely happened several weeks after the CL final against Barcelona:
Agnelli (talking to the board during the secret meeting): "We were dangerously close to winning the trophy. We should never ever risk it again.
We thought that this manager that was fired from AC Milan was just mediocre enough to keep this club afloat, but he dared to try to win the Champions freaking League.
He must be punished for his irresponsible behavior. Sell the most valuable players to make sure that this guy has no chance to do it again."
And here's what probably happened during the half-time break in Cardiff:
Nedved (breaking into the dressing room, sweaty and furious, yelling at Max): "YOU ARE TRYING TO DO IT AGAIN, AREN'T YOU?! What the fuck are you doing?! Have you seriously decided to win this game?! Are you out of your mind?!"
Max: "Sorry, Pavel, we're just much better than Madrid. There's nothing I could do about it".
Nedved: "STOP! JUST STOP IT! I don't want to even listen to this bullshit! Just don't win it at all cost!"
Max: "But how will we explain it to the fans after such a powerful first half?"
Nedved: "I don't know, make something up. Tell them that Bonucci and Alves are just morons who let you down, everyone will buy it. Also, tell them that those players bullied Dybala. I don't like this guy and plan on swapping him to Lukaku in a year or two anyway".
Now everything adds up

.