I read your question
You can't change what you've done; it's in the past; there's nothing you can do about it.
However, when you made that mistake, you realized two things.
One is that I did something I “shouldn't have done”
Two means “this wouldn't have happened if I had checked it properly”
If you are so deeply sorry and remorseful, you will never make the same mistake again.
The rest depends on what was done, but if it's about apologizing to someone or something to someone, it's decided what to do.
“It's about reflecting deeply, facing it sincerely, and bowing your head.”
Since I don't understand the content, I'm sorry that my predictions were off to a certain extent.
We all have times when it's hard and pathetic to live, and so do I. It's all very painful
Speaking of not having thought about dying, that's not the case, but there are no people who say they have no choice but to die.
No matter what kind of villain you are, there is no choice but to die. That's because it's too painful to keep living and carrying on the work.
So if you think you've done something really ridiculous, please respond sincerely and keep carrying on the work; that is everyone's responsibility.