Despite the Super Bowl appearance last year and the Super Bowl win the year before, the Chiefs just haven't looked the same the past few years as they did from around 2017-2022.
I'm not going to say they can't bounce back and make some more runs as I saw the Patriots do that, but they looked worse than when those Patriots teams "struggled". I thought Rice and Worthy would perform a lot better than they did. I think Rice hurt the Chiefs a lot last night.
I also don't think Mahomes has looked near his peak the past few seasons either. We'll see what happens, but it will be interesting to see how they retool.
Edit: This is assuming they don't make the playoffs this year. They still have a chance to do so.