Hi, LifeisCruel! True, we can compare ourselves to others and objectively see that we are lacking in some departments. But we are more than just our looks. I know a lot of men who are successful in many ways, even though they aren't Adonises.

Maybe you are spending too much time in places which attract such great-looking guys. I see guys who vary a great deal in appearance.
Besides, great looks tend to diminish over time, anyway.