What's great in a foreigner's eye may not be great in the eyes of the Japanese audience. Other than that, it's business, so rather than objectively great manga/light novels, the adapted ones are those that will sell. The reason why every anime season now has half a dozen trash copy-pasta isekai series is because trash isekai sells in Japan like hotcakes. At least occasionally there's an isekai series that's a bit less garbage than normal, such as Mushoku Tensei.
I watched the first ep of Hazurewaku. For an anime only meant to market the novels, and edgelord isekai to boot, it was slightly better than I expected (I expected absolutely terrible). That's not saying much, at all, but I'll keep watching for now.