I never post here but i wanted to do so now because this is super absurd, all three players got almost exactly what they wanted and are now possibly better off.
The whole Icardi saga started out because he was negotiating his contract, aka he wanted more money. According to L'equipe he now earns 5.7 m in PSG (a better more prestigious team than Inter btw, a team which allows him to reach more lucrative personal sponsors) which a simple google search shows is much more than what he earned at Inter. It seems like in a perfect world the Icardi family would prefer to earn that kind of money and still stay in Italy, but i'm sure they'll manage. As a cute sidenote i would like to point out the fact that the average fan considers Wanda the agent to be some kind of moron, when in reality she successfully negotiated a very big salary bump for his client, something which might very likely not occurred if the whole media circus thing at Inter never happened.
Perisic moved onto a a bigger, better team in a league he already liked without taking a salary cut. Considering his age it was quite remarkable, even if he was a sub. The fact that Bayern didn't purchase him is his own fault, he had his future in his hands.
Finally, Radja moved to a city which very much suited him for personal reasons without any kind of salary cut. Again, considering his age and habits, it was a very good result for him. If he had a better attitude at Inter he would hardly have had a better future considering he never performed at Milano, he would most likely be shipped out the same way that is happening at the moment.
Football has always revolved around players and talent, the best always rise to the top regardless of their shitty attitudes and the desires of fans, owners and press.