Your husband is using your alcohol addiction to control and manipulate and humiliate you. He is absolutely abusing you. No question. Not just marking the bottles but mocking you and trying to control you and how much you see your son, fixating on whether your ex is "winning" etc. Please call a domestic abuse hotline and talk to them. If possible get a burner phone or find another way to cover your tracks as you develop an escape plan.
Your husband is acting as an abuser not a doctor when he does things like calling you a drunk. He is debasing you. A doctor would know that you may have an alcohol addiction and that it AN ILLNESS that needs TREATMENT not humiliation and mockery and name calling. I would get the hell out.
I very much suspect you do have an addiction if you are so fearful of losing the alcohol that it remains a weapon for your husband. If you can quit he loses that weapon. (He will find another one.).
You would probably find going into treatment a wonderful experience where you can address the addiction and the other things going on in your life in a safe place. You can separate the alcohol issues from the marriage issues and think clearly.
It is very common to be afraid of sobriety but sobriety brings great benefits. Think about the sacrifices you have made for alcohol - the money, the sanity, the support, the self confidence. Think about your own self image. Giving up the buzz is hard but there is so much to be gained.