It's worth noting, though, that there were never any gripes over his character, fashion choices or off-field activities during his time at Juve.
Former goalkeeper Gigi Buffon described him as a fine trainer and great team-mate, once telling a young Pogba not to worry about external criticism: "You have your haircuts, you dress as you like: it is on the pitch that matters."
The problem at United, obviously, that Pogba didn't deliver on the pitch for United, at least not consistently.
That may not have always been his fault, of course; United's issues run far deeper than his perceived failings.
He – and Raiola – may have contributed to the constant chaos at Old Trafford but he was also a victim of it.
Perhaps he will have learned from the experience. Perhaps it will have prepared him for what awaits him at Juve. Perhaps re-joining Juve will bring out the very best in him.
This time, though, the pressure is all on Pogba. There won't be world-class players around him midfield. And there won't be any legends to lean on.
Pirlo and Buffon are long gone, and long-time captain Giorgio Chiellini has just left, along with Pogba's friend Paulo Dybala.
Even the club's supposed new leader, Matthijs de Ligt, is ready to jump ship, with the Dutch defender expected to imminently join Chelsea or Bayern Munich.
De Ligt's exit should raise funds to strengthen the squad – Nicolo Zaniolo and Kalidou Koulibaly rank among their top transfer targets – but Juve are quite clearly in a period of transition, as last season's fourth-placed finish in Serie A underlined.
They've had three different coaches in the past three seasons and legitimate doubts remain over whether Allegri, with his pragmatic brand of football, is really the right man to restore the Old Lady to her former glory.
In Dusan Vlahovic, they have a potential star up front, while the return of Federico Chiesa from injury will eventually add a whole other dimension to the attack.
But, as it stands, this is not a strong Juve squad, product of the club's muddled thinking in the transfer market (the addition of Angel di Maria is particularly puzzling, given the previous emphasis on rejuvenating the roster).
And the argument has always been that Pogba has only ever truly excelled in strong sides (at club level with Juventus, and international level with France). There is no shame in that, of course. It's obviously easier to shine in stellar sides.
The truly great players, though, can carry entire teams at times, and that's exactly what Allegri will be asking of him at regular intervals this coming campaign.
There is an understandable fear, given how things played at United, that he will not be up to the task, at least not in the Champions League, not with this Juve side.
Still, after the misery of Manchester, it's easy to appreciate why Pogba has decided to go back to Turin, where he was happiest, on and off the pitch.
But, six years on from his Old Trafford transfer, it is hard to shake the suspicion that once again Pogba has chosen the wrong project at the wrong time...