He'd have gone for free if we hadn't sold him. We haven't fucked up, like Leroy he's a disloyal splitter so there's nothing you can do with these types.
The reason Sancho left is because he lost faith in the club bringing him through, because no academy player has become a regular starter since Micah 14 years ago.
And not only that, but while they were negotiating his new contract, the club were very publicly trying to sign Alexis Sanchez for a club record fee that summer, so he thought like everyone else that with Sanchez, Sané and Sterling he wasnt going to get any meaningful playing time any time soon.
Hes not disloyal because he left, he was smart. Phil has been the anointed golden child of the academy and hes played fewer league minutes in his life than Sancho will in the next fortnight.
The club lost Sancho because of 10+ years of failure at the club to either give the kids coming through a chance, or produce kids good enough.