Hey, just in case you haven't heard this before - maybe book an ADD/ADHD test if some of the indicators resonate with you.
I have a diagnosed friend who also said the same thing about stimulants not having the expected effect. It's apparently common for drugs like cocaine and MDMA in people with ADHD.
https://www.medicalnewstoday.com/articles/cocaine-and-adhd
https://theforgerecovery.com/mdma-and-adhd-understanding-the-effects-on-neurodivergent-individuals/