>>27980
I think you're assuming too much, it doesn't seem to me that the male fans hate Itsuki, it's just that a character like him is only bound to be not-so-popular with the males, he's a gayish character in a male-oriented series after all.
And Itsuko, well, with the genderswapping the males' attention is divided only between Kyonko and Itsuko [leaving minor characters aside].
Also, Itsuko's lesbianism is done merely for comedy's sake for the most part, just like Itsuki's gayism.
In short, no one hates Itsuki, he's just not popular. Itsuko IS more popular, but only because she's the only other major character that can get this kind of attention from the males.