I completely understand how frustrating it is to consider throwing out food, especially when you have taken the time to meal prep on a budget. However, I must urge you not to attempt to wash, soak, or brine the chicken in vinegar, salt, or lemon juice to salvage it.
From a food science and microbiological perspective, an off-odor is caused by the proliferation of spoilage bacteria breaking down proteins and lipids into volatile organic compounds like amines, sulfides, and fatty acids. Acidic solutions such as vinegar or lemon juice may chemically neutralize some volatile alkaline odor molecules on the surface, but they do not reverse spoilage, nor do they eliminate heat-stable bacterial toxins that may have formed throughout the meat. Cooking or washing spoiled meat will not make it safe.
Additionally, washing or soaking raw poultry in the sink is strongly discouraged by food safety authorities because water splashing can aerosolize pathogens such as Salmonella and Campylobacter up to several feet across your countertops, utensils, and surrounding surfaces.
Raw chicken should typically be cooked or frozen within one to two days of purchase. Even if the texture is not yet noticeably slimy, a distinct off-odor is an unmistakable indicator of bacterial activity beyond safe thresholds. The safest and only recommended course of action is to discard the chicken.