How the f*ck did Maitland-Niles give the ball away that much and get MOTM? Far too much weight on one assist!
Here's a brief explanation of how they do it:
https://www.whoscored.com/Explanations
They update live, every 30 seconds, with 200 different actions taken into account that can affect the score. When the assist was made, Maitland-Niles rating went up by 0.74. That was the biggest jump in his rating in the game, but he trended upward right throughout, so must have been doing a lot of things right. Not arguing against you at all brumbys, just trying to make sense of it all, looks like there is a lot to the algorithm.
I would love to read into the algorithm detail properly but don't have the time right now, maybe at some point!