Bad handle design is a common complaint for the Back to Basics mill, if it's the one I'm picturing. White hard plastic, very vertical, with a flat handle instead of one that flares out to the side and lets you put some weight into your cranking?
The one I'm thinking of is not designed to break up large, hard grains like corn. In an emergency, you could put the corn in a pillow case and hammer it good, then put the hammered grains through your little mill.