I understand what you are saying, I don't know that I taste it, even in the same batch that others do. My thoughts are it comes to experience. I don't use olive oil, or butter, alone, just in cooking, but if I sample it, it always tastes fine. But with tea, then ya, it was too hot water, or over steeped. But I do drink a lot of tea. Maybe we both could benefit by going to some tastings. And bring some rancid oil with us to compare? Not sure how popular we would be ☠️