my male hates me too
i think they just generally dislike being handled, it says it everywhere when you're looking into buying one, you buy one thinking "it's ok, mine will like me ^^" and then they dont

try hand feeding her so that she associates you with food,
food is good
they like food = they will eventually like you
mine still hisses at me anyway, but after being out for about 5 minutes he packs it in and wonders off looking a bit happier to be free
so i guess just get her used to you, practice hand feeding her, and get her out regularly so she is accustomed to being out - routine is good for chams, so if you can do it for the same amount of time on a routinely basis, and gradually change it/lengthen it etc, she may (or may not) start to tolerate you
