How can I improve the 2:1:1 margarita recipe?
You probably are used to having a lot of sugar in your mixes. Use lime-ade instead of lime juice, or add some simple syrup. Adding orange juice also helps. Of course, this isn't "traditional", but you'll probably like it better.

If you're looking for a ratio, I would try something like 2 parts tequila, 1 part triple sec, 2 parts lime-ade, 2 parts orange juice. Adjust the lime-ade and orange juice until it tastes good to you.