"She was much younger and a fan of a group of streamers he was a founder of. He took advantage of that; not to the degree that some other people have, no, but he crossed a line."
Okay, state the line then, and what he did to cross it.
All these vague accusations without being able to say what he did wrong. "She was much younger and a fan of a group of streamers he was a founder of." ... And?
I mean, don't get me wrong. Dude was a founder or something of Polygon, a terrible outlet. I'm no fan of his. But if you want us to get on the "he should be fired" bandwagon, give us something more concrete than "crossed a line" by inviting a fan of his streaming to play Mario Kart.