[Question] ‘Maximum’ level of suffering?

Is there a maximum level of suffering that could intentionally be achieved? Say there were a malevolent superintelligence in this universe that planned to create Matrioshka brains & maximise humanity’s suffering.

Could it rapidly expand one’s pain centres, with the effect of increasing their perception of pain, without ever hitting a wall? Would adding extra compute towards torturing someone lead to eventual diminishing returns? Do we have reason to think that there’d be some form of ‘limit’ in the pain it could feasible cause, or would it be near-infinite?

I know this is quite a depressing and speculative topic, but I’m wondering what people think.