Honestly I'm not sure what your complaint is here. Or at least you seem to be very adamant that some particular interpretation/ontology is obviously the right o

Honestly I'm not sure what your complaint is here. Or at least you seem to be very adamant that some particular interpretation/ontology is obviously the right one. In standard quantum theory, electron spin can be modeled by a 2 dimensional complex vector. It's also possible to model the spin of an isolated system using 3 dimensional real vector (the "Bloch sphere").