Oof, watch the speed typing there man.
I spent six years of my life in Missouri, my brother also went there. Two things stand out in my memory:
1) Opening Day in 2004, Miguel Olivo hit a home run. While walking on the concourse one of their fans saw me and exclaimed "Holy shit a kid at one of our games! Can't get our own damn kids out here, but good for you guys."
2) Living there on my own from 2011-2017, there were magically a lot more fans once the latter half of 2014 hit. They stuck around for a year. Then suddenly they were gone again.
Since 2000, the Royals have finished in the following place in the AL
14th: 1 time
13th: 6 times
12th: 4 times
11th: 4 times
10th: 1 time
8th: 1 time
6th: 2 times
In that same time frame, the Sox:
13th: 3 times
12th: 3 times
10th: 2 times
9th: 3 times
8th: 1 time
7th: 3 times
6th: 1 time
5th: 2 ties
3rd: 1 time
So to recoup, since 2000:
1) I also lived it, their fans were miserable outside of the WS seasons.
2) The Royals consistently drew worse, having never drawn as high as the Sox highest, and the Sox never drawing as low as the Royals lowest.