A thought just occurred to me...

I think there’s a small prayer that asks for the Lord’s help to understand thing that can’t be changed.
And BTW, you’re by no means, alone. Many of us feel as you do.

Things without all remedy
Should be without regard.
What’s done, is done.
(Macbeth: act 3, scene 2)

I do the exact same thing!

It's really hard to let go of things you cannot change. "Don't be so hard on yourself" is something I have to remind myself to do daily.

I've done this for half my life, based on one thing I regret. Some days I feel as if I deserve to punish myself. 'Tis a terrible place to be. 🥀

Well you recognize the mistake at least. You can stop punishing yourself

Well it’s time to stop

Humans do that.

Join the club!