I think the Bills got out coached at the critical moments and the game plan left them susceptible to exposing their lack of creativity and play design, on defense and offense, and that's more or less what happened. Last week baltimore didn't match up the intensity but this week the Chiefs did and at key moments brought more. When the other team brings more intensity, you have to use that with creative plays to make them pay for it and Buffalo failed at the key moments in doing that. While the obvious answer is execution, it'd help to make the chiefs guess more.
Part of the problem Buffalo, specifically in the playoffs, is banking on "what's worked all year" especially defense, meanwhile the other teams are designing very good plays. I think I counted 4 plays total from Buffalo that were all of these:
well designed, timely, unpredictable, and well executed. where was Buffalos elite defensive play, ah there was none. Reid is better, Spags is better. 2 punts and a turnover doesn't get it done (as usual). Chiefs scored their highest point total of the year last night.
being repetitive, predictable, risk-averse, and relying mostly on out executing the other team is limiting.
i thought this year the bills were hiding a chunk of the playbook based on some comments from allen, didn't see that yesterday.
most bills fans shouldn't be surprised.
all of that lends the game to being decided by officiating.
On paper, the bills had no business being in that game, especially with Elam in there.
Overall, I think they over achieved.
Best of luck to your pats next year, losing sucks.