I've encountered this bloke Armstrong before, as I'm based in Russia and he's a freelance who lives in Moscow. He's a rag who's open about his bias but is actually from the Manchester area.
I'd ignore him, personally. He's managed to acquire a blue tick somehow but I've never seen him writing for an outlet of any consequence. Meanwhile, in what I have read of his work, he successfully conceals any minute sliver of talent that he may possess.
Rabin took him on and, last I saw, was schooling him quite comprehensively. To be honest, I don't see the need for other Blues to pile in as well. He's an attention-seeking knob, so denying him attention is the most effective policy.