Then she only came back for each half year because people complained about nothing growing anymore, and thus Zeus sent Hermes to get her.
My head canon is that she wasn't tricked by Hades to eat the pomegranate, but did it deliberately knowing very well that she would have to return to him because of it.
The myth varies wildly by who retells it but the pg version is he tricked her into eating a pomegranate seed which somehow was part of his domain, indebting her to him. She wasn't interested in him as a potential husband at first because he was the loner who was never on olympus while other god/heroes were making a name of themselves.
He may have been one of the most poweful gods but his reputation was that of a basement dweller without any great deeds or cool stories attached to him, since he spent most of his free time keeping all the dead people, ya know, dead.
I'm always a bit torn on these modern revisions. Medusa, Persephone, etc, they all promote an interpretation of myths that simply aren't true from most records, and thus portray an inaccurate version of the societies that told them, but, on the other hand, these myths never really had much in the way of "official" versions anyways.
If people change them to match the values of the times, that's more than a traditional way of doing things. Hell we KNOW the versions we have are culturally biased, especially towards Athenian interpretations.
It was a silly joke they keep laughing about over dinner.
According to OSP, Hades got permission from Zeus to kidnap the girl, which more or less how things were done still. (Yes, we had ritual kidnappings.) It was Demeter and her codependency on her daughter that caused problems. So Persephone is essentially doing caregiving service for mom every othern six-month interval.
Old-timey pre-Hercules Disney paints Hades as kinda Satany which informs 20th century interpretations. Curiously in the Percy novels, Hades is more true to Hellenism, but gets a touch of the diabolic for the Lightning Thief movie.
I mean, if you ignore that women were very much property to be traded in Hellenic/Mycenaenian society.
It was hardly a unique problem in those days, of course, but the simple reality is that, even under the ritual kidnapping interpretation, which is very, very debatable, what Persephone wanted never really entered the discussion.
Hades definitely has his issues (e.g. kidnapping someone and tricking them into eating the fruit of the underworld), but most of the other famous Greek gods were worse (especially Zeus).