That's gonna give you bad onions.

I know the thing! I just mean you can't really sharpen those curved blades.

After repeated use/storage if you look at them under magnification they're almost always jacked up, which may be fine for carrots or potatoes but leads to the spray when shredding onions

exactly, those things are impossible to sharpen if they get dull and then you're less shredding the onion and more grinding it into a pulp and spraying onion juice everywhere