People who want to avoid ingredients need to check ingredients.
There are masses of people who recognise that, once producers/retailers have done their part and complied with the regulations, it's up to them to check ingredients and/or nutritional information on products they buy.
There's people with allergies, people with intolerances, vegans, vegetarians, coeliacs, Mormons, Muslims, Jews, other people with religious restrictions, people with alpha-gal syndrome, people on MAOIs, people on Antabuse, people on metronidazole, people with phenylketonuria, people on a medical ketogenic diet, people with liver disease, people with kidney disease, alcoholics, diabetics, people prone to contact dermatitis, people with high blood pressure or high cholesterol, people who just really really hate the taste of certain foods… who have I missed?
You want to avoid even mildly alcoholic foods because of your history with alcohol. Okay, makes perfect sense, there's lots of people in that situation. You don't mention a potential physical health consequence, so presumably the problem is that you feel it could be psychologically dangerous for you to taste alcohol, or to have the knowledge that you've ingested alcohol. That's completely understandable — and entirely your responsibility. You're no less capable of reading the ingredients than any of those other people. You're no less capable of making your own decision about which kinds of items you'll take the risk of not checking, either.
I'm probably more irked by your post than I would otherwise be, because — as well as routinely checking ingredients lists for gluten and nutrition information for sugar — I've had to spend more time than I'd have liked, over the past few years, searching around for and downloading safety data sheets from the internet, cross-referencing them with bafflingly technical Wikipedia pages about chemistry, and trying to make inferences from incomplete data. I do this because I have a family member who reacts badly to a particular set of chemicals that are a common ingredient in toiletries and cleaning products. Unfortunately, cleaning products — even if they're ones that are very likely to get on your skin, like washing-up liquid or surface wipes — don't have to list their ingredients like toiletries do, so I need to do the legwork. I don't get it all nicely presented to me on the back of the packaging, let alone emphasized on the front.
And you're here complaining about not getting an abject enough apology or a big enough compo voucher when you complained that there was a small amount of alcohol in a luxury pudding of a type which commonly contains alcohol. Alcohol which you have already conceded did not, in fact, have any negative psychological impact on you, and which was not only listed in the ingredients for you, but warned about directly above the info panel on the front of the box.
I'll think of you next time I'm hunting around online trying to find a safety data sheet to investigate whether using a particular cleaning product on the bath will turn my family member's skin into a scabby mess.