I totally understand the mistrust that you have for the meds and the doctors because of the experience I've had with them. I've tried 4 different medications and I still want to die, but because of family, I'm desperately looking for something to make the wait more tolerable. Every time I have tried something, it always seemed to work for a little while, but then it just wouldn't do anything, which leads me to believe that I have just been experiencing the placebo effect every single time.
Maybe it is the case that these medications can and do help some people, but in my opinion, it seems like the doctors that prescribe them only do so because it makes them more money. Profit will always be more important than the well-being of the patients, in my opinion.
If you have been taking these medications for a while and stopped taking them because it doesn't feel like they are working, then I would recommend trying a different medication. Maybe you will find one that actually works, but if not, then at least you tried.