There actually are other options for treatment-resistant depression, which is defined as depression that has little or no response to standard treatments like antidepressants.

• Transcranial magnetic stimulation (TMS): uses magnetic currents to stimulate the brain while awake, typically provided 5x per week for 6 weeks (although there are now newer protocols that are much shorter in duration)
• Ketamine: a general anesthetic drug typically provided via a nose spray 1-2 times per week for 8 weeks
• Electroconvulsive therapy (ECT): uses electricity to induce a small seizure in the brain under sedation, typically provided 2-3 times per week for 3-4 weeks

Source: https://www.mayoclinic.org/diseases-conditions/depression/in-depth/treatment-resistant-depression/art-20044324

I try to spread the word about these treatments when I can because TMS helped me immensely after trying just about every antidepressant out there with no luck.