I have seen people make anarchist anti-authority takes on this. I have not seen people look at it from a marxist perspective, probably because it's quite difficult to interpret anything that happens in terms of class struggle created by contradictions between the productive forces. The takes I've seen have always been anarchist while quite shallow along the lines of his battle being that of a battle against all authority included that of fate itself.

I think some issues arise with even that take because ultimately even anarchism requires collaboration, and Guts fights by himself because he's special. This ties in with typical tropes surrounding power fantasies in media and I believe power fantasies in general are very right-wing.

It has been such a very very long time since I read the material or looked into this topic and my views have definitely developed a lot since my original reading, perhaps someone more up to date could get into more depth about it.