@SerpensR
I'm agreeing with ezdez on this one. If a reader has to go to a wiki in order to understand any part of the story, then the writer has failed to write correctly. The manga adaptation of Death March is quite bland at times. Even the anime was bland at parts. It's meant to be a far more laid back isekai than most, but this isn't Western Restaurant Nekoya's anime, nor does it compare to Izakaya Nobu in writing quality for the manga.
I personally like it, but there is such a thing as whether or not an isekai is objectively good. And this isekai is objectively meh. The highlight of this series is the main character going around, exploring. Series such as Girls' Last Tour and Kino's Journey do that far better than Death March, giving an interesting and engaging story to go along with the actual events happening. Kino's Journey does the engaging story extremely well, having characters introduced and backstories properly told. Girls' Last Tour has the flavoring of mystery and intends to bring the reader into their world to explore and wonder with the main characters about what's going on.
Death March's flavoring is a mild touch of food review and a fantasy world. It's the vague MSG and excessive cheese taste of a mediocre writer. It's not terrible, but it's not that great, either.