There is no "why" from this Nazi Prick. It's just hate with a childish passion. He won't answer your question, and you can't help him.
Personally, I don't mind Orihime. Sometimes, I dislike her for being a bit annoying.
But she is so kind, sweet, gentle, and innocent with a godlike power.
Maybe someday, there would be more character development on Orihime before Bleach is ending along with Rukia.
And for that, I can't wait.
But for this Nazi Prick, he wanted these characters to die.
Why?
Because he is a hater with a childish passion.