Complex sentence: She thinks that she is not very feminine despite that is the truth, she is very spunky, doesn't like cute things and rather sharp witted than the two but she herself has some bad table manners and extremely hates bugs.
Split into simpler sentences: She thinks that she is not very feminine despite that is the truth, she is very spunky, doesn't like cute things and rather sharp witted than the two. Mizuki herself has some bad table manners and extremely hates bugs.