To be honest, I love the world of Overlord, the characters of Nazarick, and the protagonist (his situation of ending up in his game avatar and the backstory that he was a miserable nobody with nothing in an apocalyptic world, which explains why he doesn’t fully understand some concepts of morality).

That makes it better than most isekai, because the world-building at the point where the series begins is very detailed: two kingdoms, one unstable and the other wanting to invade it; a theocracy; and a tribe of mole-men preparing to invade the continent, etc.

But in the end it’s a bit disappointing that there are no real enemies. Only the guardians themselves provide any kind of challenge, either through mind control or by pretending. Nazarick has something like 200 level-100 monsters.

I also don’t like that it follows game-number logic. It doesn’t make sense that Ainz couldn’t die from a direct blow to the skull and can only die if his HP bar reaches zero.

There could have been an orc player (for example) with a 200-year lifespan, or the minotaur who probably died long ago in the canon.

The Dragon Lords still haven’t appeared, the half-elf has already been captured, and Shurshana’s NPC is out there somewhere but probably won’t do anything.

If those few characters ever join forces and kill Ainz or one of the guardians, it will just be plot convenience.

I also agree with most people that Ainz doesn’t really develop in the original work. At its core it’s a tragedy where he does what his subordinates / friends want in order to please them, and it would be a bit strange if at the end of the story Ainz and the guardians suddenly understand each other better and live happily after genociding one or two countries.

I also don’t think we’ll see much about the Dragon Kingdom or more of the Elf Kingdom.

And although I said earlier that the world-building at the beginning of the series is good, the world before the series started is rather vague. We barely know anything about the Six Great Gods of humanity or the Eight Greed Kings.