Lessons from Crash Test Girl:
1. Publishing houses publishing autobiographies really need, in addition to the usual editor, someone who can take the author aside and go "This anecdote/narrative you've constructed makes you look like a sociopath, are you sure you want to include it?".
2. Overthinking isn't the same thing as introspection and neurosis isn't the same thing as self-awareness.
3. There are a lot of therapists who think their job is to hand shitty people rationalisations to let them live with themselves as-is instead of helping them grow into non-shitty people.
4. If being a Starving Artist is such a central component of your self-image, you don't really have to tell people the story about how your dad once bought a Rolls-Royce Phantom on a whim, particularly as an example of how your family was struggling financially when you were growing up (because her mom was mad about it). Same goes for your extensive world travels, even if you do think visiting India gives you spirituality cred.
There are a lot of surprises in this book, but the main ones are all about how Kari Byron turns out to be a much more unpleasant person than I thought she was. At the same time, when reviewing a celebrity autobiography it's probably unreasonable to hold being cruel and self-centred against the author too much, so let's focus on the expected instead: the fact that M5 should not exist as a business and Jamie Hyneman should be in prison.
We already knew that, of course, but in Kari's account of her first years at M5 and Mythbusters we get a closer view of the mechanics of unpaid internships and underpaid "junior" employees, and how all of it depends on a steady stream of people who are both eager to be exploited but also economically stable enough, in actual fact if not necessarily in belief, that the exploitation remains possible—presumably Kari's view of her unpaid internship would be different if her sleeping in her car had ever amounted to more than LARPing, but she was still insecure enough about her "career" that she agreed to things that are still clearly making her uncomfortable fifteen years later (her first appearance on the show: the butt scan) and things no sane person has any business expecting from an employee, because she convinced herself the person not even paying her to do it would surely fall in love with her positive attitude. It paid off for Kari, obviously—her career is over now (she's still in denial about it at the time of writing), but one of her listed regrets is "not buying a bigger house in San Francisco before the tech bubble"—but that's also the point: the unpaid internship acts as a class barrier, and a genuinely working class person would not have been able to take it in the first place.
The upshot is that all of her career advice is actively harmful for almost everyone, and will only lead to exploitation above and beyond the usual. It may not surprise you that she also dresses it up in the usual shallow white girl-boss feminism you see in entertainment. (How did "leaning in" work for those other female unpaid interns at M5 Industries, Christine and Jess? Let go and working in different industries now, you say? Weird.)
There's a lot of other crap here that really didn't need to be committed to print, but I don't think it's necessary to go into it; in a better world, this whole review would just have been about the little sidebar on pheromones on p. 45 (which claims that "scientific research has proven" that sex pheromones (which humans don't produce) are the reason women's periods sync up (which doesn't happen), but allows that evidence for them causing sexual attraction is inconclusive) and the fact that she credits the song Sixteen Tons to Johnny Cash, and I wouldn't even have had to read about her anxiety about her then-unborn daughter "suffering from" autism, much less the rest of it.
The so-called Build Team in general and Kari Byron specifically always kind of felt as outsiders in M5 and Mythbusters, so I continued to have a fondness for them even when it became hard to pretend Adam Savage and Jamie Hyneman were decent people. For Byron specifically, Crash Test Girl has certainly managed to dispel that.