I'll leave it here - hope you don't mind me being critical. So, far, I'm giving you a review on your first four chapters.
WRITING
Leaves much to be desired. The sentences have repeating words. Often, the context of the story is not understood.
Under a dark, dreary sky, the light crept from beyond the dark cloud that covered the sky.
One ray of light sneaked across the dark trees and fell on the boy lay on the shining blue glass.
I already know the sky is dark and dreary. Shining blue glass where?
"So the legend was true..." He muttered.
This is a better opening line. You can describe the world by attaching your words to this point of view this boy was giving. I don't know how the world is - although the sky is an important part, I don't know what else is different about the world. The ground? The smells? The horizon? Which structure contains the glass?
Such things happen intermittently through the story. The paragraphs shift much too quickly from one thing to another, hoping that the reader will accept the "meta" of the genre. Now, I'm not really a big reader of Cultivation World Hero genre, so that goes over me. For example, I don't like the "System Screens" that these Cultivation Isekai use often. Even then, perhaps a little better typography would help the reader?
The R-18 part is okay. I liked what I read so far.
Also, in the last chapter I read, you switch out the perspective. I personally don't like that. I don't like it when authors switch perspectives mid-chapter. Perhaps you could wait for the next chapter to shift the perspective from Jay to Vivian?
There are some obvious spelling errors and grammatical mistakes, but we all make those to reach the deadlines.
So, yes, maybe a proofreader and an editor can help you make the story snazzy and swift.
THEMES
I like the idea of the Infinite Ladder. It gives a reason for the weathered tone of the narrative. The MC is bored of the worlds. But that isn't very clear from the text, and I am just using my conjecture.
It seems like revenge is the main idea for the MC. He wants to "beat the system" - a common theme in Cultivation of course.
For an R-18 story, it is still very mild. You can delve deeper, and write without hesitation.
CHARACTERS
But, I think the characters so far have only been stock. The MC is a reticent, angry, young Cultivation hero with a "special" power in the world he is in. He does have an established motive, but I would have loved to see more or his emotions. I get his impatience, but that is also very stock.
The females are firstly a twisted noble - a stock a character, and a young, run-down-on-her-luck Mage - which is again a stock character.
You could have kept the assassination from the reader. Maybe show that the MC is suspicious of one of them. Right now, there is no tension between the characters. There is a lack of an established conflict between them, even though the actions in the story are moving at a breakneck speed.
For example, I don't understand the deal with the Duchess. She is the duchess but people are not looking for her, even though she was missing because she was with the Goblins?
Heck, people would move armies for such a high ranked noble.
So, there is that sort of imbalance.
Perhaps by this you wanted to show how broken the world is? If so, you could have explored more in the town. Instead of saying "it looks like a town out of the Wild West of USA" show more about who occupies the town.
A good book to read up for this would be the Gunslinger, by Stephen King. We must all learn from the masters. I remember the entrance of the Gunslinger into the town of Tull - he takes three or four paragraphs to describe what sort of people were sitting on the streets, the music that was being sung in a church of the town, and the sight of a girl sitting beside old men who had a palm inside her shirt. You get the sense immediately that this is not a good town, that the world has in fact ended as we know it, leaving behind this debris. Again, I don't understand the world.
So, to summarize, I think you can do better in the worldbuilding, the characters, and the mechanics of the writing itself.
NOTE - this is a very critical critique. Please do not take it personally or harshly. ? I'm sure you can do better as you have a very good plot and lots of promise. I will continue to read and leave my thoughts about it.
