The meaning of 'struck out my whole former life'

The below paragraph is from a book, Man's Search For Meaning.

To get the exact meaning of the last sentence, I looked into Webster's Leaner's Dictionary. And of the six meanings, I think it's #2 meaning that fits into the original sentence. Am I right?

Yes, he was beginning to understand. A grin spread slowly over his face, first piteous, then more amused, mocking, insulting, until he bellowed one word at me in answer to my question, a word that was ever present in the vocabulary of the camp inmates: "Shit!" At that moment I saw the plain truth and did what marked the culminating point of the first phase of my psychological reaction: I struck out my whole former life.

?strike out [phrasal verb]

1 baseball a strike (someone) out or strike out (someone) of a pitcher : to cause (a batter) to be out by pitching three strikes

? The pitcher struck him out with a curve.

? The pitcher struck out the first two batters.

b of a batter : to make an out by getting three strikes

? The first two batters struck out.

2 strike (something) out or strike out (something) : to remove (something) from a document : delete

? The editor struck out the last paragraph.

3 US, informal : to be unsuccessful : fail

? “Did you get her phone number?” “No, I struck out.”

4 : to begin a course of action

? She struck out on her own after graduation.

5 : to try to hit someone or something suddenly

? He struck out wildly with his arms.

— often + at

? He struck out wildly at the police officers.

6 : to make a sudden and angry attack against someone

— often + at

? Both candidates struck out at their critics.