Aside from not addressing the INT caused by Mike Evans, the WR you championed in your post to which I responded (hint: you may want to look at Evans' drop rate), I'll address the blatant falsehoods in your post.
KC averaged 8.5 yards per play against the Bills and 6.08 yards per carry. Is that good? Do you think that they had a higher yards per play or yards per carry against any other opponent this season? Mahomes completed 73.9% of this passes...little to no resistance from the defense all game long, whether on the ground or through the air.
The Bills defense forced FIVE 3rd down plays by KC. Only once in the past 25 years had an NFL team run fewer than five 3rd down plays in a game. Is that good?
It was pretty obvious to most that the Bills game plan on offense was to grind out methodical drives, in an effort to keep the defense off of the field. It became pretty clear that the offense would have to score every drive if the Bills were going to win the game, as the defense was going to provide little to no help. Even McDermott acknowledged in his post-game press conference that the defense & ST needed to play better.