There are a myriad of psychiatric drugs that could pose beneficial to your symptoms of social anxiety.
Some people even find relief with SSRI medication (not that I advocate SSRI use per se).
There are SNRI agents and dopamine reuptake agents.
You can move into the GABA system with benzodiazepines as stated above, though difficult to get a prescribing doc these days. Took me a long time to find one.
Then there's the gabapentinoids like gabapentin or pregablin. GABA B agonists like baclofen, GHB etc
The list goes on and on. Perhaps you should seek medical assistance for your predicament.
Just my 2 cents
alcohol doesn't do it for me either. it makes me sleepy, overly sedated, and plain old grumpy. The majority of poor choices I've made in my life (and I've made some pretty poor ones) involved alcohol. It tends to leave me in a state of depression and an even stronger craving to abuse stronger substances.
I have found Rx diazepam twice daily to work nicely.
kratom and phenibut are two legal options, assuming you're in a location where these substances are legal.
heroin, and any opioid is likely to reduce inhibition and create a state of euphoria. I was a serious heroin and all around opioid addict for some time. I was drawn to them because they made me feel normal. I am extremely introverted and socially anxious. Heroin was a blanket and best friend that could protect me from anything.
Kratom is an opioid fyi, albeit rather weak.
I highly suggest not using heavy opioids for anxiety relief. You'll end up strung out and I've heard of one doc using opioids to experimentally treat depression and anxiety, it isn't common practice as I'm sure you know.
What country you in?