Pixel problem when using the ctr + t tool

[Canonac]

Ctrl + t - using this tool makes the pixels on the edges translucent instead of sharp.
Feather set to 0.
Anti-Alias ​​is unchecked.
I create patterns on the material and I still have a problem with this pixel, because there is a line when combining images because of vertical and horizontal reflection.
It is so tiring and extends the work.
Or is it a major setting?
I make sure that the feathering is 0.

Can anyone suggest something?

[c.pfaffenbichler]

Are you transforming destructively instead of using Smart Objects? Why? 

What was the Interpolation setting of the transformation? 

What is the Photoshop > Preferences > General > Image Interpolation setting? 

Have you checked out the Extract from Image-options of the Library? 

[c.pfaffenbichler]

Ctrl + t - using this tool 

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In Photoshop if something is not represented in the Toolbar then it’s generally not properly called a Tool.