You don't know the narrative if you're saying that.
Raiola at the time asked for his client (Pogba) to get guaranteed playing time, as he wasn't getting playing time under SAF. He was in the first team and SAF kept saying "soon / you're nearly there" and Pogba in his head was like "What does soon mean?" because the opportunity was never given.
So after Pogba and Raiola asked SAF for guaranteed games per season SAF said "I don't even give Rio, Vidic, Scholes guaranteed game time, so I won't for a youth player" along those lines. Then a game where Rafael was in the midfield after an injury crisis Pogba effectively said f-this and signed for Juve.
He did want to play for United he just felt United didn't want him to play for them.