That’s kind of the point of the meme. They’re “identifying” a TERF by appearance alone the same way TERFs “identify” trans people by appearance alone. Neither is actually possible to do, and the only way a TERF can refute the meme is to point out their logic in believing you can judge people by appearance is flawed. The joke isn’t in the appearance bashing, the joke is in the that appearance bashing is clearly invalid and the more people who point that out, the easier it is to defend trans people when the same thing happens to them.
I can’t guarantee that was OPs intent in posting the meme, but it was certainly the original point of the meme.

Edit: Just realized I replied to the same person twice with the same thing. Probably didn’t need to do that. Sorry.