I dont blame him one bit. He's going to be 21 this season and he's stuck in NextGen. He's a mediocre talent and has no future here. He's so mediocre that even with Juve freezing out 50% of the squad, he still cant get in it.
Although now that I think about it, he's probably frozen out too. No chance they let him around the team while in negotiations. That's not the "Juve way."
But hey, let's try to make Juve the poor victim here and act like Chiesa's agent is somehow screwing the club again. How dare he not extend his expiring contract so Juve can try to loan him and maybe sell him next summer, or just keep him in NextGen for another season. That would definitely be what's best for his client.