>>3960092Akuma is isolating herself despite her highest desires being just behind her. In fact, her past self who was less aware of her own "sins" (represented by her Dark Orb) is going after baby Madoka and Ultimate Madoka like we'd expect Homura to do.
And then Ultimate Madoka obviously represents a genuine deity figure who transcends time backwards and forwards, whereas Homura can only ever look to the future, or more likely inside herself.