Kratom

Opioids, and Kratom, as it's similar, work great against a variety of mental problems for a short time. I believe some opioids and tianeptine, which is not that different, are even prescribed against depression occasionally. The "sweet spot" is not the big high, but an ever so mildly euphoric state, as from "softer" opioid painkillers.

Regarding painkiller opioids at moderate medical doses, I found the time for which it works to be about 6 months. Then, you'd really have to up the dose significantly or stop immediately.

Even if you do stop then, it's the "small hell" of withdrawal already, it can take weeks and months to be your former self with all the same problems again, and having to take it medically will be an issue for years to come.

The system really needs to get it together, diagnose and treat people. Self medication doesn't work out that well.

Metta Beshay has a much more nuanced explanation about taking Kratom as it is traditionally used, and the Americanized concentrate bastardisations. Plus his addiction and withdrawal. He also has ADHD:

https://youtu.be/Pqx_bMGeGwc

Edit: I think no drug should be illegal but I do think gas stations or cigar ships, whatever should be forced to educate their customers about any newly introduced drug that wasn't part of the local culture already. That and proper packaging warnings. It's ignorance that gets people into trouble.