Stockholm syndrome only happen toward the person keeping you as a slave or prisoner while seeming nice or at the very least neutral.



This never ever happened toward the one who punish you all the time, that get angry often, or that you fear ; otherwise you were mentally sick to start with.



Even with a Gaster nice at the beginning at best and neutral at worse, the syndrome is broken afterward if it had the time to happen (Gaster turning evil is felt like a betrayal if the syndrome is present).

The condition where it continues even if the person in front of you turn abusive is only though manipulation and over time, suddenly hurting them is not gonna work.



If Pap is delusional, it's from its personality directly and not from any syndrome.