Honestly It's pretty lazy, there isnt really much exciting things going on at the same time a lot of the story telling is done in a way to excite most readers of the genre so it's very simplified and unrealistic, but why did i rate it as high as "8"?, It's simple really because I rate the manga based on the genre and the category it falls into. To be exact, this manga itself falls in the category of "that fantasy manga with harem, overpowered MC, with loyal servants wishing all of his command" category, In terms of other manga's in the same category this one hits the nail for making the fan of this type of manga very satisfied/, those things are?
OP MC: the MC is really overpowered, imagine ainz in overlord, guy can just cast a freaking spell that breaks every rule in their world.
Waifu: too much waifu that comes from his "gacha" powers, yes his waifu's are from his powers which is a gacha and he has like 4 Super ultra rare, and hundreds more of SSR or SR. Honestly dont care about waifu's because in this genre's everyone looks the same from each other manga, but in this one they actually have some original designs.
Servants: same way people liked overlord is because of the unshakening loyaly of ainz's servants, this manga also has that servants that makes the MC like a badass king.
Revenge: Most revenge in this type of category always feels like too overwelming or underwelhming, this tho fits the perfect phase.
and so on, if you liked something like slime, overlord and any other OP MC manga, with some kingdom building, this shit can offer the same. I'm not saying this is manga is a Great one, nor even a good one. This is the type of guilty pleasure manga, and I think the author knows it as well what kind of manga he is doing because he is taking mostly everything readers like to a guilty pleasure manga and made this. basically OP MC, kingdom building, gacha waifus, loyal servants, fast revenge stories, great art to compliment the manga. If I'm gonna rate this normally this would be a 4 at least, but I'm rating this based on the category itself because I think it's unfair to rate this that low with how much I know most people that likes the genre of this kind would have love to read this.
btw dont be fooled to think the MC would just be a wimp OP MC, he's very ruthless to his enemies, to the point he would cast magic so you wont die and torture you endlessly. He can even be sometimes be very dark to his own servants if he feels like they are over stepping. So yeah if you like stupid manga that makes your brain go off but at the same time activate that guily pleasure feeling of liking it anyway then this is for you.