Read it somewhere on Twitter so i don't have a link sorry. But he criticized their board for their decision resulting in bad a bad season once again. Said several players want to leave for a reason etc.
He also said they pressured him to renew so they can sell him for more money and now media and fans all think it's just about money for him.
I mean that's just one side but it was pretty clear he won't continue at Ajax for long. Maybe its Raiola, maybe his attitude or maybe it's true idk.
But the Roma move is smart and there were probably better options (financially) for him so it seems he cares about his development and not only the money.