>>1511655Threads on /bant/ exist because there's a demand for them to exist. If they're totally pointless, they die without gathering a single reply. If those "spam" threads are lasting for days while supposed posts with "real content" in them die in a couple of hours, its because from /bant/'s PoV at least, they're more important.
You can only change /bant/ by giving it new material to work with, and if those materials are actually better then what was before they'll talk about that instead, but if it's just pretentious shit, it'll be saged and ignored. Talking about how to "fix /bant/" is pointless armchair whining which is worth less than the lowliest anime thread.