She was a fine culture fit. I can tell you this because they kept her around for quite a while. Bad culture fits don't last, especially not at a well-run firm. Culture fits aren't soul mates, there are still normal difficulties and things to work through.
People had trouble working with her possibly after she brought up issues of sexual harassment and discrimination, but there's actually something under the law to protect her from this, anti-retaliation laws, which she tried to sue Kleiner over and lost, but that part of the case definitely seemed like there was some merit to although possibly not enough to meet a preponderance of the evidence.