I think self-withdrawal as much as not ideal is sometimes the better option if you have a bad doctor, experience rapid detoriation and doctor is not willing to work on that with you.
But that should done only in rare instances.

Taking old scripts, someone elses meds, prescription drugs off the internet... could be downright dangerous, even if you check your interactions online.

Stop starting meds a lot if a great way to mess up your brain and psyche. I think if you ditch your meds and are ditching them regularly, you need to talk to your doctor... because clearly that stuff isn't doing it for you. One needs to be pretty assertive too when something is not working for you.