As an Indian, who has lived and worked in USA, UK, Singapore and LatAM, I can attest that produce in supermarkets in all these geographical regions are tasteless. Mostly because, as someone mentioned below they are now bred for ease of shipping. Even in India, vegetables are slowly going the tasteless route, particularly chillies and garlic, but they are a lot more flavorful than their western world counterparts. I remember as a kid garlics were so pungent, you could smell them from a mile. Not the case anymore.