[myaccount9786]

I don't believe anyone could be 2200 and fall to 1300 because I am 1800 and I crush 1300s 99% of the time. And 2200s will crush me 99% of the time. How that decline happens?

So you're saying that you could crush me but are getting beat by 1300s who anyone at 1800 could crush easily? F to doubt.

Edit: for example https://www.318chess.com/elo.html. there is a statistical analysis of lichess data as well but it went down a few years ago.