Double standards.
You can say both:
1. he is a diva and is causing problems in his club
2. he is so devoted to Barca that he is willing to sit on the stands for 1 season just to come for free to his dream club
When Dembele and Coutinho were doing shit in their former clubs, they were "showing their love and passion" for Barca

Just because they are technical players, loved by fans.
When Rabiot does the same, he is a diva.
If we will sign Rabiot and if he will be mad for not playing, people will say: oh, the diva strikes again!
If Malcom would do the same, people would say: Stupid EV is killing this guy's confidence. Why is he not letting him play?
We can make double standards and 2 stories out of every situation (we are ALL doing it), based on whether you like a player or not.