Based on my reading, porn addiction isn’t a real medical condition and is largely driven by internalized or external stigma around porn usage. Usually, but not always stemming from a religious worldview that shames people for masturbating or having an interest in sex outside of the context of heterosexual marital procreation.

There could be small numbers of people who truly have an unhealthy relationship with porn, but if so, they are greatly outnumbered by the people I described above, such that I haven’t found research on their experiences.