As someone medicated I actually fully agree with you.
Depression is also a broad spectrum condition (much like autism). Years ago I watched this lecture by Sapolsky[0] and it really helped. Breaking down the different classifications is really helpful. The SSRIs always made me feel worse, and this (along with a lot of other research) helped make sense of it. A few years back I was diagnosed with ADHD and a psychologist friend encouraged me to give Adderall a try. It was the first time that medication "worked" and it really made a big difference in my life. The big reason why being that psychomotor retardation and anhedonia were my biggest symptoms. When coupled with an anxiety disorder it creates a strong negative feedback loop.
But here's the thing: medication isn't the cure. For me it alleviates (not eliminates) symptoms but at the end of the day it still requires work from me to ensure I create a positive feedback loop and don't let myself fall into that destructive loop. This is all stuff I had to learn on my own and through reading and seeking out friends with people who are more experts in the area. That's where I think our care system fails.
The best thing I can recommend to people is to be introspective. Each journey is personal, but whatever your issues are try to find the early warning signs. For me it can be little things like the dishes piling up or my desk getting messy (these seem you be common). Things like depression build up, so look for the signs. And most importantly, open up. This was the hardest for me and makes me feel demasculated and embarrassed much of the time. But I've also found it to help build stronger relationships with my partner and friends. That it helps open a door to communicate both ways. Maybe you open the door for you, but you also open a door many are too nervous to open themselves. It's worth the discomfort and gets easier with time. (Talking behind a handle is a great way to start too. So make alt accounts if you need to. That's how I started)
you took amphetamine and weren't depressed suddenly? in my experience, that lasts a bit, but give it another decade or so. it tends to bite in other ways.
Going to depend on your dosages. I try to stay low and will take breaks to help reduce dependency. I actually really dislike the feeling of a high dosage and it does have negative effects at that end.
Also remember that everyone reacts differently to things. SSRIs work great for some people, but not for me. So it's worth trying different classes of medicines too but also to make sure that when having more dangerous ones. I made sure close friends knew too
What ways?