Pregabalin works better than benzos even stims for me now.. can somebody please explain to me why?

Long story short, been sent to a mental hospital and a sort of camp that punish kids for being no good kid they forced me to take all around 6 months of anti-psychotics. Then I got home got big muscles but mentally noodles, you know headaches all day it gets stronger before sleep and gets intense when I woke up. so doctors prescribed me anything I wanted back then, concerta, huge dose of clonazepam, Xanax, Ativan, Valium. And something I don’t want like good old ssri. Yep and nothing works. Except pregabalin, I went to a gleneagles hospital and I just asked a doctor to prescribe me some pregabalin and he did. I used to take pregabalin for benzo withdrawal, didn’t take it seriously. At first the dosage was 150mg it seems working, I knew 150mg was small dosage for people who got huge benzo tolerance like me, so I slowly added up to 600mg, and THIS IS IT, all the pain, GONE, and for nearly 4 months, the tolerance didn’t add up, with or without benzos. And it gets rid off my headaches after I smoke. I been on these things for 2 more years now, and this is the only final drug that works and doesn’t have any side effects. I’ve studied stims and benzos these years and just use these knowledge to against my old psychiatrist, she doesn’t know what pregabalin is, asked her about that one time, year ago. So why does pregabalin works so well.