Little late but for all those hyping Mark: He had an incredibly good matchup and tried to throw g1 in turn 1. Had Koki made the obvious play, the game would've been over just there and Mark looked silly af. Koki needed to make risky plays tho, since it was the only way for him to compensate the matchup. Remember that, while it was nice to watch indeed, a good player doesn't risk the game t1, especially not with such good matchup, but uses his advantage to win the game in a clear and calm way, just how the japanese guys in Masters did. Mark was lucky that Koki needed to make plays, but just because his risky play worked doesn't justify his early throw. In other words: Mark did everything to not win, at least in g1 but rather to look as cool as possible. If you want to call that a good player, go ahead.
All in all, everyone with a little understanding of esports must realize that this worlds clearly showed why pokemon will never be one.