Everything is sexist to MEG. Her TOS reviews were horrid because she was looking at a 1960s show from a 2000s perspective. Not a good thing.
Never heard of her before this thread, so I looked them up to see for myself. So far, out of the first four TOS episodes only one has mentioned sexism at all, and in direct contrast to your claim it contains the following disclaimer:
This is all much easier for me to dismiss on a 1966 television series than it is when it occurs in 1995 Enterprise episodes, so while I can't not-mention it, it doesn't particularly diminish the episode for me
EDIT: Just read her review of ENT "Bounty". First, it's no harsher than Bernd Schneider's review, and second, it doesn't mention slaves at all. Also, I didn't see any mention of the phrase "worst writer", but with your fucked up grammar I'm not sure what you meant anyway. You're not under the impression she wrote the episode, or some other bad Trek episode, are you? Because that's one possible way to parse your mangled sentence.
EDIT #2: Okay, maybe you meant "Bound" rather than "Bounty". She does call it the worst Trek episode ever, and cites sexism as the reason why. I haven't seen it, so I can't comment on the accuracy of her review, but again, Bernd Schneider criticises the same things in his review. Nor does she make a particular deal about the slave thing in and of itself. There's nothing in her review that a real life BDSM enthusiast would object to.
Marian