Why can't I use the bevel equally on all my loopcuts? Double edge problems I found some answers in this question already posed, but without finding the solution.
(Bevel tool creating intersecting faces)
I knocked down the wall several times rebuilding it in different ways and then cutting it again with the loopcuts, but each time I was presented with a different error that I will try to point out through multiple screenshots and also uploading the file, which had already been subjected to a another question.
1). So, what I have to create NOW is a wall that includes cavities along all the cuts (loopcuts), the same ones that I managed to create in the central entrance doors. see fig. 1.
while in fig. 2 I show you how the wall texture should be.
 (fig.1)
 (fig.2)
I would like to create them manually instead of attaching a texture to you, what do you recommend?
2). Alternatively I thought I could create them by directly extruding a portion of the cut face, but this would involve further cuts to my only surface, which already seems not to work correctly. (besides, there are also some oblique cuts to be made).
This is what I would like to do: in figure x, you can see the exact blunt edge, where some loops work correctly, while others don't. fig.y
furthermore in figure y, you can see how in transparent mode some walls are visible and others not.
 (fig.x)
 (fig.y)
3). I noticed that there are several double edges and vertices which sometimes prevent me from loopcuts or change the direction of the bevel. How can I remove all duplicates? (fig. 3 and 4)
In the vertices I tried using the merge - by distance, it signals me a lot of vertices and applying it several times gets to 0, but I'm not sure if it has removed them. What about the edges instead? how do i locate them, know where the duplicates are and remove them? Do I have to do it manually or is there a shortcut?
 (fig.3)
 (fig.4)
ps. I wanted to upload the file but now it weighs 76mb how can I do? is already compressed.I put this google drive link to download the file.
https://drive.google.com/file/d/182UTa6t7IOB7K0iE7T3Nr6QqnF-4NoOk/view?usp=sharing
I'm not sure to understand what's the method you're using, what are the problems you're encounting, etc, but if I had to do this kind of walls, I would make only one segment that I would repeat with the Array modifier to make things easier, and for the bricks, if you want to keep the whole thing as one unique object, you could:

Cut some orthogonal lines, bevel them:



Extrude them and bevel the extrusion (for example with a Bevel modifier with Limit Method &gt; Angle):



If you think that there's a problem with this kind of method, please tell me?