Plenty O Fish in the Sea

You have embarked on a quest to find the One Bit! Your first step is to find the scattered pieces of the treasure map on this here abandoned island!

How I got the flag

I extracted the zip file and there was a log file inside it. I opened the log file in text editor and there was so many texts.
There are exactly 18531 lines in that file. Interesting thing is most of the lines are common and duplicate.
So I searched for a line and replaced with empty string. After repeating this several times, there is nothing left except the flag.
Now I replaced all the newlines with empty string in VS Code and now parts of the flag got closer to each other.
It is an URL-encoded string. Here, %7B represents { and %7D represents }. Similarly, %21 represents !, %40 represents @.
I decoded the string to normal text and got the flag.