I don't think Orihime is a bad cook, actually! The only people who have eaten and commented on her food in canon both said that it was good. Rangiku, and Tessai, I think? It seems silly to assume that Rangiku and Tessai both share her taste in terrible food that would make anyone else sick when we haven't seen her cooking make anyone sick. So I've played Orihime as someone who experiments, and fails, but she's a pretty good cook when not experimenting. And she loves it, so that's good. XD