How to make 2D image's quality better for small objects?

I have images that are depicted very small in the game.!

Why are pixel images poorly depicted contours (in some places even disappear). I suppose this is some kind of compression, but how to disable it? I want my images to be displayed so beautiful with which I painted them)!

138131-capture.png

Hey, i think you can set the size very big, but then scale the images down. (They are two different ui elements in the rect transform)

Select the texture from “Project”
Texture type → Sprite (2D and UI)
Filter Mode → Point (no filter)
Format → RGBA 24
Compression → High Quality