Y'know what, I've been enjoying Buffy but I also agree with nearly all of this. I wonder if I'll be able to finish all...how many seasons are there? and still enjoy it. I absolutely agree about the dialogue, which pains me and causes me to do a lot of rewrites in my head, though it also leads to some silly-writing-makes-plain-silly-comment-over-the-top-hilarious. I think I've blocked out any examples other than the overuse of "___ girl/guy" and even the slang I remember people using being applied to way too many situations (Look, if you were genuinely frightened and you're somberly informing someone of this, this is not a case in which you say that something "gave [you] the wig(gins)."), but there are much more egregious examples to be had.
And the feminist thing - THANK YOU. I've only watched this and Dr. Horrible of his, which I thought was cute with good songs, but I recall reading that his whole thing with this show was, "Why does the blonde chick always get murdered? I'm gonna make her badass." And then I watched it, and there was rampant failing of the Bechdel test and WTF is it with Buffy, and now Willow, sucking on a damn lollipop? Major side-eye to that. Also, in one episode where a werewolf was savaging people and they had self defense in PE, I recall Willow telling Buffy that she was "supposed to be a meek little girly girl, like the rest of us." Um, okay, you are such a good feminist, Joss.