ML is great as a general and fighting but the biggest plot hole is with all that fighting, I'd just leave that country if I were a citizen. Throughout the whole story all the people in power just keeps on fighting each other and there was nothing done to improve the peoples lives including the ML. This plot hole is glaringly obvious since I just finished another novel called who cares.

it also seems pretty ridiculous since the author make it seem like the ML never wanted the throne and he was a regent for so long. He could've taken the throne but just went all the way around to get to the throne. He was first discovered to be the illegitimate child between the emperor and the princess rouwan (the emperor r*ped her while drugged and she was married then, she also really loved her husband and hated the ML) then, it turns out he's the child of another prince who died wrongly and his adopted father (the husband of princess rouwan and a general) was not dead. Instead, he was trying to avenge the dead prince. You see how that is so complicated and what kind of general would go that far to avenge a dead prince. The adopted father should be the final villain instead with all the mess he made.

honestly the system and the lord god stuff seems more like a plot filler to add more length (the FL went back to modern world, came back to the novel world with original body and amnesia, died with the original body and alive again with the novel body) since they were not all thought out. What kind of lord god would be that busy just trying to fix one world when there's thousands of worlds. Also, he got killed pretty quickly.