Thinking on Guts, it occurred to me that he’s never been the type to look for meaning as to why his life has sucked. He’d simply accepted/resigned himself to the fact that it was harsh, and kept trying to push forward however possible. Hence him being dubbed a “struggler”, one that fights against fate and cruel reality.
The manga has put the main character Guts through some horrible and mind breaking stuff. That’s why it is impressive to see how he pushed forward regardless.
If I could define it, it will be as this user from the r/berserk subreddit did: https://www.reddit.com/r/Berserk/comments/qsadk0/the_concept_of_the_struggler_and_why_it_could_be/
The manga has put the main character Guts through some horrible and mind breaking stuff. That’s why it is impressive to see how he pushed forward regardless.