I've lost 11 of my last 12 Rapid 30 minute games. I had a rating of 1394 on 2/21/2021 and now I am down to just 1219. I can't believe it. Is it possible that at near age 86 I have lost all ability to play chess?
Just look at your 1-year rating chart. The 1394 was most likely an unsustainable hot streak. Your present rating is most likely near the end of a cold streak. (As long as you're not really going senile.) Your real strength is very likely halfway between the two.
You had another crash and recovery back in July/August, but you didn't even mention that.
I've lost 11 of my last 12 Rapid 30 minute games. I had a rating of 1394 on 2/21/2021 and now I am down to just 1219. I can't believe it. Is it possible that at near age 86 I have lost all ability to play chess?