In my experience... sorry to be a bummer... but nothing. Read very closely all the "success" stories you've read "it's an every day fight" appears in EVERY SINGLE ONE. So, in essence, it never fucking ends. I'm with you here bro, ready to top myself (if I wasn't a parent, and that was an option), that dark cloud hangs over me too. You gotta find something else, I have a legit script of benzos but with my history it was very hard to get, those help with anxiety/depression. Not really fun to abuse, but just at their right recommended dose produce a happy, peaceful feeling. Nothing compared to heroin or suboxone or other opioids, but definitely second best. Best part is, there's no real nasty side effects (your drowsiness will abide after awhile) like there are with seroquel, vistiril, and all that antahistamine-sedative bullshit they try to give drug addicts with anxiety/depression problems. They're not hard to find on the street, but I wouldn't recommend obtaining them this route because your supply will be unsteady and the withdrawal can kill you. Also (this is a problem I have right now) my suboxone doctor refuses to start me on suboxone because subs + benzos = death in a very small percentage of people. So if you obtain benzos, and decide to go back to Subs, you'll have to pick between one or the other.
Edit - For the unfamiliar, benzos (the most common) include Valium, Ativan, Xanax, and Klonopin. Though if your goal is not abusing them, I'd recommend against Xanax and Valium, they both have effects that seem to temp people to misuse them. I was lucky, you pretty much cannot just ask a doctor for a specific narcotic and get it, but I did. I told him I tried everything else and everything else sucks ass. That was the truth though, anti-depressants give me unwanted side effects (weird migraine like impulses of exploding pain in my head when I ejaculate, I am not joking), seroquel knocked me out 18 hours a day, and vistiril is so weak i wouldn't call the squad if a 2 year old swallowed an entire bottle. Thorazine caused unwanted twitching in my neck, making me look crazier than I was... etc... you get the point. It took me 10 years to finally get my script and now I have the Suboxone doctor telling me I have to give up what I fought years for to treat my heroin problem? Fucking quacks. I hate all of them.