Well, as it appears, now the teams are offended because the players want to leave, this does not seem right to me, if a player wants to leave, then he can leave, it is normal.
When Atletico Madrid brought him from Benfica they spent quite a lot of money but unfortunately he never showed anything impressive since his presence the average goal he made at the club was very low every season and when compared to his transfer fee it was not comparable and Atletico Madrid increasingly disliking when a player expresses his desire to play with a rival club is like betrayal for his current club, of course that's not a pleasant thing for a club that has spent huge amounts of money but player says it wants to play with a rival club.
Of course Atletico will not defend him if there is a club that is willing to buy him at a price that has been set by Atleti, but unfortunately the club he wants is very unlikely to buy him at a high price, even when Barcelona will be left by one of his forward players, Barca will be more focused buying a defender rather than looking for a replacement for Dembele, so Joao Felix's situation is indeed very complex and that will make it difficult for him to get a place at Atletico Madrid this season.