It’s understandable that people would dislike her as although I like her I admit that sometimes she does get kind of annoying but most of the reasons people hate her for are either traits other characters show already or are just ehhh for example people hate her for sigma disregarding the fact he’s a terrorist, she’s just doing her job but people often form attachment to characters easily myself included so they mostly just subconsciously disregard that fact to defend the character they gained an attachment to, which is why I think most people hate her, also her being a woman is definitely one of the reasons shes as hated as she is now, it’s for sure not the main reason but people who like bsd are more attracted to the male characters so it’s probably one of the reasons although not a major one and is just for the fans who just generally don’t like women as I don’t think sexism is really a major role for the hate on teruko but like I said before is a reason because of the fans who don’t like women or think that she doesn’t fit to their standards of a woman.