And what was the content of the thread like? Was it derisive? Yes, hence making fun of it. One of them became straight out trap porn because of how many people said it just straight out looked like a guy and the others focused on how butthurt tumblrinas get that beautiful women exist and posting example of people upset that they are making fun of the design.
It's always the tumblrina defense, whenever 4chan makes fun of them and has a laugh at their expense they project anger and distress onto the people mocking them, to spare their feelings that people think they are shit at what they do.
Let me guess, you think threads where people post the worst art tumblr has to offer and laugh in is actuality just anger?