Keep playing. Ever hear of an "Aha Moment"?
Edison believed in perseverence - he invented thousands of light bulbs that did not work.
That's the trick - take a break. Go do something else - take a walk, fish, read a crime novel.
Einstein pondered things while he slept - and woke up after dreaming one night and crafted the theory of ralativity.
Believe in yourself - whether you think you can or think you can't you are right! I bet you can improve
How do you know when to give up and just accept that you aren't any good at chess, and probably shouldn't waste any more time on it? I'm trying to get better, but lately it seems like I'm regressing and playing worse than when I first started.