Sounds to me like you did the right thing and that it's the Medium admins who weren't responsible - imho Medium should have taken down the offensive article and given him/her a warning that if it happens again he and his publication will be shut down - Also, it's NOT a legit reason to say she/he is stressed and that's why the piece stayed - editors bear a responsibility and if they can't meet it then hand over or share the responsibility - If it were me and I were an overworked editor - the FIRST MINUTE I got a notice that there was offensive content (mine or someone else's) I'd give that first priority...anyway, good article. Interesting.