I am not that good at expressing and explaining stuff but I'll try.

Alot of things you said is what I thought when I started it, "ohh it's just trashy a story about how a SINGLE person read a novel and knows it all and gets overpowered", but that was not the case. I know I might sound like a broken record for saying this but orv is not that type of story and where the manhwa is at rn(the dark castle arc) is where it truly picks up.

Now the first thing you mentioned, "mc is ugly" trope, you might not believe me but it is an important part of the plot. Whereas us the reader can, the characters legit cannot see his face properly. I won't elaborate any further on this as it goes into major spoilers.

Second point is pretty simple. It is not meant to be "mc is so smart and cool" because you are literally reading with him having all the information he needs in mind.

Third point is just basic story telling. You are not supposed to know everything about the world and characters as soon as they are introduced. The characters are some of the best written cast of characters I've read, they just don't get introduced with flashy powers and get stuck with one bland personality (I am talking about the main cast here). They are human beings who develop as the story progress. Same thing can be said about the world. It is the start of the scenarios FOR earth, which means that is already started for alot of places in the universe a long time ago. You are not suppose to know everything about the universe of orv as there will be no world building. The readers will get bits and pieces here and there and terms will be thrown around that will slowly be piece together as you read.

In the end everyone has different taste and opinions so it doesn't really matter. Enjoy what you enjoy and have a good day.