Not disagreeing completely oldtimr but yes there is such a thing as a gamey taste in venison. And it isn't all just from mishandling. It's from lactic acid in the meat. If a deer ran after it was hit, it will have a buildup of lactic acid that didn't have a chance to dissipate before it died. And yes lactic acid has a very distinct "sour" flavor often called "gamey". It is why most deer in general that were taken with a bow will have a bit of gamey taste to them. If every venison meal you have eaten has had that flavor you will of course assume that is the general flavor of venison. I have eaten meat from many kills that were dropped on the spot and do notice a difference in the flavor. It's not a huge difference but it's fairly easily noticed.