Adding beer to my chili gave it a spoiled taste. How can I salvage it?
I doubt you can salvage this dish. Once you add flavors you can't take them out, you can try to compensate and balance using other ingredients, which you have tried. Beer adds sweetness, bitterness from hops and sometimes acidity depending on the type of beer, you would need to judge which one you need to balance and add an ingredient to do that. However, you added baking soda, which is bitter and has a metallic taste, flavors which are unpleasant. Adding more ingredients at this point are unlikely to help, I would suggest you start again.