Marty came across as a slimy prick in the (otherwise excellent) Noclip documentary about the making of Doom (2016). Turns out the real-life version is much worse.
So I watched the Noclip hoping to understand the design choices better. Marty was disgustingly smug and assured about it all, coming across like a victim for being a misunderstood creative genius. Several times he implied the 2016 breakout hit he was following up on was dull and repetitive.
That helped me understand where it all went wrong. I'm devastated but not surprised that Mick got treated this way. Props to him for choosing to get the word out instead of taking a payoff. I hope there are professional repercussions for Marty.