There are a few things about wine you should know before you choose to drink it again.
Over 80% of all wine produced and sold today have a long list of ingredients, ingredients far away from grapes.
Beside Sugar and water, there is a long list of chemicals added to wine to make it look good, taste good, to improve texture, etc.
The additives which can be added without notification include:
acids like H2SO4
artificial yeasts and yeast enhancers
various egg products
casein a milk protein
isinglass - a clarifying agent made from fish bladder extract