Look, arguing about this transfer fee and duration is pointless. It's not under our control, and it depended on others' evaluation of him. Juve, Atalanta and his agent came to an agreement that it is 5 mil, and there's nothing we can do about it. We cannot go back in time and change that. So stop bringing it up. Every player needs to be paid his wages. We've wasted a lot more in wages and transfer fees on players like Amauri, Martinez, Elia, Stendardo and the likes. Hell, we can even argue that we're wasting wages on Del Piero considering how little we're using him this season. But in the end, it's pointless. So stop bringing it up.
And I'm not defending him. I'm merely trying to do what you state in your signature: treating him fairly. I set my expectations on his talent, skill, what he offers to the team, and how he's deployed. And considering this, saying that he wasn't useless is pretty fair. You still haven't given us a credible reason other than your own prejudice against him and the wages we paid for him. All of which, is irrelevant.