(at time of review read till chapter 22 then dropped)
You would think that with all the things going for it, such a series is bound to succeed?
The very synopsis, despite its confusing phrasing basically says that this guy was already a novel protag who dealt with an alien invasion on earth and now he got transmigrated due to that alien tech and is now in a fantasy world.
And that is where the novel begins, because anything that happened before this, is irrelevant.
The protag isn't some battle hardened vet, he's a toddler playing a game. It's like he's playing a game where he is 200% sure he's going to restart later with a fresh slate so for this playthrough he's going to just laze around.
Do people that play games like that actually exist? i'm not even sure.
The fact that he was basically a protagonist even in the previous world? irrelevant. His skills translate to this world? not at all. He doesn't take any situation seriously, so why should the reader do so? There are no stakes. And yes, i know that certain novels/ manga can excel even with that premise that but this is definitely not it.
The art doesn't particularly help either. While yes it is definitely above average as far as just the looks and still images go, the artist is probably more suited to draw a shoujo rather than an action manga. The action scenes have zero sense of depth or purpose, strikes carry no weight and there is no sense of 3d space / positioning or anything.
The protag at one moment acts really panicked that his territory is on the brink of a rebellion but the next moment he's like alright i'll deal with it later, time to dance now....
You might think i'm joking but i'm literally not. That's how little urgency there is in the manhwa.
He trains the bare minimum not because he realizes it'll be good to have some skills but rather because another character forces him to. Then later on this basically backfires cause he faces a tough situation and his soldiers get injured but guess what, it makes absolutely zero difference to him. He's all like, i'm going to fight myself because it takes so much effort to train a soldier but then he himself hardly did any practice and at the end of that situation he isn't even like that he should have trained but instead just glad to make it through.
He has zero motivation to improve on anything, hell he doesn't even know the limit of his power which is basically assumed to be limitless till the random moment in combat it pops up that he's getting tired and he can only use it 3 times more, like what? its just really poor storytelling as well.
Anyways already said but TLDR: skip this series, it is a serious headache to read how little the protagonist himself cares what's going on in the plot, treating it like a literal simulation he can just save and load