Here's the thing. If it was saying "All you bad Doms get out," then I would agree with her more. I would still disagree - I think the big thing is education and experience, and a lot of bad Doms aren't bad intentionally, they just haven't got the relevant experience and pointers to be good Doms yet; we all start somewhere - but I would understand where she was coming from. But nowhere does the author state "Oh, but you good Doms, you can stay." No, she just says "You straight males who like to Dom can fuck off, it isn't a kink and you're horrible people." Not in so many words, but...that is basically what she's saying. She mentions 50SoG once, and if that was the main point of her article, it would be at the beginning, not at the end of the list, tacked on like an afterthought. And if she was telling "Bad Doms" to get out, she wouldn't also target Switches, since - in my experience - Switches all too often make the best Doms since - as somebody pointed out already - they (we) have experience of both sides, so we can empathise and identify more with what the Sub needs (I like to think I'm a good Dom, but only my partners would be able to say that; everybody thinks they're the best, haha).
So whilst I think the whole "Bad Doms who come in thinking they automatically own you and can do whatever they want and think that Grey did everything right can piss off" is more understandable...I don't think that's what she was going for, since she never made that distinction. And if she were, that whole tangent on Switches wouldn't be there. She also wouldn't have taken the time to clarify that submissive men were OK, or that she likes walking into a room and seeing a man in a cage rather than a person in a cage. She also wouldn't have outright said that Male Doms aren't engaging in a kink, they're "Just reflecting a Social Norm." It just reads like she has an issue with Male Doms full stop, and that's what I have an issue with; the hypocritical, ignorant kink shaming.
It's ironic, really. She criticises 50SoG for missing the point of a BDSM relationship and being ignorant of the wider community (which it is) and then in the next breath displays a shocking level of ignorance and intolerance of her own towards a Kink she obviously doesn't understand.
And, of course, as a Switch I'm still steaming about the whole "Switch Isn't A Thing." I'll have you know, bitch, I'm probably more kinky than you in some ways! My sub tastes are very extreme compared to my Dom tastes. >.>
But that's just me.