UI textures are pixelated no matter what res or settings I use

I’m trying to make a 2D target in my game using a simple PNG I’ve made in PS. For some reasons, no matter what settings or resolution I use, it looks pixelated. In the screenshot the size is 90x90 and I’ve imported it as 1024x1024.

271956-screenshot-1.png

That’s partially the reason, see how it behaves if you scale down to 64 or 128 instead of 90 - it will look better; also double click the image in the editor and set Compression Settings to UserInterface 2d