I have no idea who's the bastard behind this pic, but the Costanza face makes me believe it was a troll's work

Notes:

The closest thing i could find to the source appears to be a tweet made by Sarah Nyberg on November 3rd, 2014. Either it was sent to h̶i̶s her email, or Sarah ̶h̶i̶m herself created the drawing in a desperate attempt to discredit GamerGate.