Sometimes we can feel that our running is getting worse rather than better.
One time when I was feeling frustrated about that in my own running I turned to my friend Google.
I had only got as far as typing in "running getting" when all these suggestions came up! Plenty other people had been there before me!
Sometimes just realising we're not alone is all that's needed. (And of course that's why this Forum is a blessing).
By the way there are lots of reasons why it may occasionally FEEL as though we're getting worse. The one "reason" that's NOT true is that we ARE getting worse, though. We do not get worse at things by practising them.