
the fuck is his problem?

No I think he's more Obsessive, I'm pretty sure he doesn't have DID. If he did there would need to be something traumatic that happened so that he devolpes DID. In the raws he wanted him to be his only and didn't want him being touched by others. Even if he had DID his personality needs to switch entirely and he would also have some memories lost.
even in irl, some so-called fans are pretty fucking stupid