I killed a large mule deer doe while I lived in Western Kansas. Other than quail or turkey, that was the best tasting wild meat I have ever had.
It tasted just about the same as beef. It did not have the wild flavor at all. Possibly due to their eating a lot of corn, milo, and wheat. My hunting partner and I shared it 50-50. His wife prepared some loin for a meal and invited me to eat it with them. Boy she knew how to cook it. It was both tender and flavorful. My wife was deceased by then and I just took all of mine and left it with them, I asked if they would invite me to eat a few times if they would.
That is the best way to have it prepared. By someone who knows hos.
Diet has a lot to do with meat flavor. But a good strategy is to marinate it in buttermilk before cooking.