How is this possible? Are there rare genetic cases I may have?

New to this group so maybe yall got some input… I’m 5′ 6″and 150-160lbs and I’m 24 goin on 25. Since my 21st birthday I’ve been a very heavy drinker, and i usually mix with my xanax prescription and oxies or hydros and cocaine. I’ll drink an absolute bare minimum of a fifth of whiskey a night. Most nights I drink 1.5 – 2 fifths. There has also been more than a couple times I drank 3 fifths in a night (usually a bourbon, a rye, and a wheated when i drink 3.) I start at 5pm and usually am done by around 12am or until the bottles are empty. I drink it completely straight out the bottle and always try and have an empty stomach before and while drinking so I can feel it more. My favorites has always been knob creek 120 proof bourbon, and wild turkey rare breed rye 112.2 proof. I always aim for 100 proof or higher and have drank and collected every single kind of non-flavored whiskey you can find at my local liquor stores many times each over the years. What confuses me is I never ever had a withdrawal, I dont get hungover, and even when I drink 2 or 3 bottles I function very well. I am able to still cook, clean, and take care of my kids and pets with no issue and walk and talk fine. I know its a bad problem but for some reason I tell myself it’s not a big deal because I’m able to function and do what needs done and honestly I don’t ever get drunk anymore really. 3 or 4 times I had to stop cold turkey due to jail or rehab and didn’t withdrawal or need detoxed. My dad was like this too, but he said the second he turned 26 he started getting hangovers and withdrawals bad so now he’s 44 and a severe alcoholic and starts drinking around 5am just to not suffer. What may be causing me to be able to drink and do so much other drugs without getting stupid and fucked up?? Why haven’t I ever had any withdrawals? And why don’t I really ever get hungover? Same with drugs too though, I had a point where I was doing lots of blow and pills too. like one night I drank 3 bottles of whiskey, ended up snorting like 4gs of blow, and eating like 6 or 7 oxy 15s and like 5 blue 1mg footballs (xanax), followed by an 8ball of crack. I quit H and Meth years ago and took up drinking thinking its a safer alternative but now I’m not so sure anymore. I can’t seem to stop drinking, even when I had almost a year sober cause of jail and rehab, I got back home and started again. This shit is harder to quit than any drug… But is it possible that from all the different adhd pills and other meds I was given my whole childhood fucked my brain chemistry and makes it possible to do all this? Not just alcohol either. One night i took 400mg of oxies, and drank a bottle and still drove my friend home alright. I used to wake up and take 8mg of xanax just to start my day too. And last October I turned myself into rehab after doing 35 grams of cocaine and 14 bottles of whiskey in just 6 or 7 days… Like, do I have a liver enzyme disorder? Maybe a fucked up brain chemistry?? All my friends wonder how I do it too and I’m starting to wonder if it’s more than just “tolerance”. Sometimes I do piss or shit blood so I know there’s damage for sure, so I slowed down alot since November after rehab because I don’t wanna die and leave my kids fatherless. But I am super curious as to why I can tolerate so much and feel fine, like I’ll legit go to bed, sleep for 3 hours, and wakeup ready to work at the farm. Sometimes I don’t even sleep at all and still go to work feeling great and ready to roll.