What bothers me most about the Zizek trans article is the sheer laziness. I do think there’s a point buried in there that’s worth considering (the gender binary doesn’t “work” for anyone — though that’s a point that’s not unique to Zizek). But if you want to join a debate, especially on a topic where people are inclined to distrust you, you need to earn your place, you need to prove to people that you have something worthwhile to add. And part of that would consist in, for example, citing literally ONE actual trans theorist instead of vaguely gesturing toward "the kind of thing" you've picked up through osmosis. Then you might actually not make dumb mistakes like treating "cross-dressing" as the most relevant form of trans experience, etc. (Yes, he cites Butler — but she is hardly the cutting edge of trans theory at this point, and it's yet another example of him trying to ride on work that he did decades ago.)
As always with Zizek's political columns, they've "got people talking" — but only about Zizek himself, not about the ostensible issue at hand. With this article, he has ensured that no actual trans person or trans ally will listen to what he's saying, and so the only material effect of his argument would be to reassure people who are dismissive of trans issues.
Zizek is of course responsible for the way he has chosen to write, but publication requires the go-ahead of an editor. Why was Zizek comissioned to write on trans issues, an area where he has no expertise? Why wasn't this article edited for clarity and focus? Do the clicks that result from Zizek's notoreity outweigh any concerns for the editor's responsibility, not just to the readers, but to help authors present themselves in the best possible way? Given how routinely these kinds of sloppily written columns, filled with "anti-PC" digs that undermine their own point, appear in left-wing publications, I am tempted to ask the editors that immortal question: "What is it that you'd say you do here?”