Everybody hates Usopp? From the people I know, offline and online, only this one dickhead who happens to be my best friend hates Usopp. He says Usopp is "too weak" and therefore useless. He totally misses the point of Usopp's character, but I'll forgive him seeing he is a total retard.
A lot of people are indifferent about Usopp, but as far as I know not that many hate him.