Have you tried a local farmer's market? You can get fruit with real flavor that you'd never find in a grocery store. I think it is worth the time and premium price...
I’m not an expert on this, but nutrients in the soil seem to have an effect on flavor - brix? perhaps.
I do shop around the grocery stores for quality and flavor. I have taken to grinding my own hamburger from higher quality cuts of beef too. It is cheaper and a much better flavor. The corn though has been changed to something I would not recognized. Maybe if I find a seed source from historic types to grow. I absolutely would swear that corn is now grown for higher sugar content so it works better for corn syrup, sweeteners and of course make more ethanol per bushel. Remember the taste of corn on the cob? It tasted like corn, not canned cream corn. It had huge kernels too.