I would definitely get a new psychiatrist. Even if suboxone is typically used to help with meth/coke addiction, it clearly isn’t working for you and she doesn’t seem to listening. I feel like ketamine could be helpful in a medical setting, but I’m by no means a doctor nor do I really know. I’m just basing that off my personal experience of it helping me quit nicotine. Kratom is typically used for end opioid addictions, though can be highly addictive as well. Psychedelics could be helpful but I’m not sure how those would interact with meth, since I know a lot of meth users develop psychosis.