 If you liked
Hai to Gensou no Grimgar
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 ...then you might like
Re:Zero kara Hajimeru Isekai Seikatsu
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Isekai - MC transported to another world.
This world has medieval technology and fantasy creatures/magic/fighting/themes.
MC are not particularly strong, often lose their battles, and must adapt and change in order to move forward.
Both works are not shy of capitalizing on the use of death and despair.
Characters are memorable, and the relationships between them are important to the story.