Yes, the risperidone is probably blocking some of the euphoria. Kratom already has less euphoria than many other opioids (subjectively speaking), so i think it's the culprit. Trazadone probably isn't helping either.
If you're looking for pain relief, the kratom should still provide some in spite of the antipsychotics you're taking. Like treezy said, you can ask your doctor for a different antipsychotics med. IMO, there are many newer and much better antipsych meds than risperidone.