Isekai tr*sh, harem+kingdom building variant. Harem, op modern common sense, op main character powers, no character development, dense main character, conspicuously easy to resolve conflict, very easy to convince side characters of modern ideas, nonsensically competent aide, absent parents, tragic backstories made and resolved in a few chapters, insane pacing, all idiot antagonists, etc. Other than those common isekai patterns, there is also constant pov switches, info dump galore. All of this within the first arc, about 15 chapters in.
So, this is the perfect novel for all isekai tr*sh fans containing all of the downsides and upsides (constant face slapping) of those tropes. You'll know whether you like it or not within the first two chapters if you don't know already.