Sakura poster here. Honestly your reasons for not liking her are totally valid, so I'm not offended or anything. It's when people's reasons for not liking her are based on her lack of virginity that bores the fuck out of me.
I guess I've always had a thing for anti-heroes or characters with a dark side, which is what drew me to her. I completely agree that some of it was OTT, but I was much younger when I first read the VN so it was "new" to me at the time.
It's like when I try to read/watch similar stuff now, I find myself getting bored because it's no longer something I've not already experienced if that makes sense?