Durant requesting a trade is proof of it, because I doubt it's management.
Durant does not see any reason for him to stay with the Nets, the team has been dismantled by the Celtics in the 1st round, so they have lost their morale and other teams may just not respect them. Let him move and move until he can finally find a team that he would stay until he retires, Durant is an MVP, any team he will play with will become better as long as he is happily playing.
Durant is known for leaving the team if he knew that he can’t carry it or get a great achievement on it. He leaved Oklahoma before even if they have a good run and strong team after being almost sweep by Heat that time. And now he is leaving again Nets because he can’t do a thing with this team. He is like Lebron which always want to be on a team that surrounds him with strong player while he is on the center. A lot of will surely wants him to be on there team but I doubt he can have a team like GSW before that has a very impressive long ditance shot while leave him on the inside attack.