So signeds are better because they overflow differently?

If you program C like there's no overflow, it doesn't matter much whether you mis-index the next array with 4294967295 or -1. There's no substitute for overflow-vigilance, and particularly not rules like "such-and-such type is bad and such-and-such type is better".

(BTW: an ex-boss of mine claimed that signed ints were evil because because and insisted on using unsigned for everything, but that's a different story, and I'm glad he's an ex-boss)