I certainly feel more compassion for Polunin after watching this, I previously thought him foolish and slightly deluded for leaving the RB.
He has inner turmoils that I believe other great artists have suffered- Tchaikovsky, Van Gogh, and various contemporary musicians come to mind. As a child I imagine he must have felt completely abandoned, and that is a great trauma for any youngster. Maybe not everybody would react in the same way to such trauma, but his seeming resentment of his talent makes sense, in that it has taken him away from his family, even if he does love it. To love and hate something at the same time, I think, would create much conflict within his personality.
The motivation and discipline that one commentator in the film thought he now lacked and hated, brought to mind Steven McRae, who seems conversely to thrive on discipline. I think they're an interesting contrast in that sense, even if they seem to have the same passion and perhaps vanity (?).
Some may see the film as a expression of "poor me", which in a sense I think it is, but it certainly does enlighten us as to his decision to leave the Royal Ballet and give us the opportunity to understand and have some form of compassion towards him.
I loved "Take Me To Church". I think he should do more work like that, where he can express himself and be free. I guess there are more ways than one of being a thriving professional ballet dancer! He's doing things his own way, in a way that works for him, and I respect that now.