What techniques can actually help to quit stuttering?

What techniques can actually help to quit stuttering? I’ve tried everything: therapy, breathing, talking slowly, relaxation products such as CBD oil, but nothing helped, at least not permanently. I’ve had it for 10 years and want to get rid of it ASAP!!!! What helped you guys and why can’t I get rid of it? I’m so f…. done with it I’m literally on the edge of taking psychedelics/drugs to reset my brain and to stop stuttering. So done with it. Everytime I stutter I almost have to cry because it’s bothering my so much and even sometimes don’t want to live anymore because it’s affecting me so heavily.