200 Survivor Games Data
/EDIT: It's not my data, i found the post on reddit.
Post on reddit: https://www.reddit.com/r/deadbydaylight/comments/iq29rb/im_back_with_more_stats_on_killer_prevalence/
It has the same trend as my data of 60 games (until my stupid excel deleted the data somehow). So basically you have ruin in 2/10 games, so where exactly is the problem with it?

Comments
Appreciate the work you put into this as I can tell you really put a lot of time in. The quality is S tier.
One of the biggest take aways for me:
"On average, a killer perk released in the last year was only present 1.83 times in 200 matches. Pathetic"
I agree. This should be a sign of the poor balance in new perks being released that we've been saying for a while. So many new perks come onto the PTB, everyone says they're weak and how to change them, and then they remain weak on release, never to be seen again. With a couple rare cases of actually decent perks on PTB that then get nerfed to trash on release and forgotten as well. (Hangman's and Gearhead come to mind immediately, RIP)
People aren't asking for new S tier perks, just make them decent enough to be worth running. Fun and "good" aren't mutually exclusive.
This improvement in balancing would also fix the stale perk meta we have on both sides, emphasized by the 9 perks making up 48.4% of all perks encountered in your sample size.