I don’t know much about women, but I know calling them pretentious, their emotions absurd, their conversation inane, their intelligence non-existent and their mental age toddler level probably isn’t the best way to keep them around long-term.
I don’t think that it’s the case here. The bf talks about inane babble and implies that OP has the intelligence of a 4yo, that makes more sense if the narrator is a virtual gf bot than for a real and autistic human.
The 4chan board is probably robot9000, or r9k. It’s common on that board to refer to posters as “robots” instead of “anons”, “fembot” is their equivalent of “femanon”.
Something struck me, I first pictured the boyfriend as the classic overweight, smelly, unkempt neckbeard. Are there new visual tropes for these sorts of pseudo intellectuals or are fedora-clad 2010 Jonah Hill lookalikes still the stereotype?